My Prediction For Each Sub-Roles "Rework" and Which Sub-Roles Will Get One
The sub-roles that will get a rework are:
- Assassin
- Diver
- Vanguard
- Warden
- Enchanter
- Disruptor
The champions that will be in each of these are:
Assassin
Diver
Vanguard
Warden
Enchanter
Disruptor

And finally why...
Assassin
Reasons: Design is bad and usually whatever becomes good with him is amplified harshly by his evolutions, making him a "This evolution is the best" so you take it and make that play style for him OP
Reasons: Design is bad since he is known for just straight up murdering people and offering nothing else to his team, if you don't snowball, you get destroyed
Reasons: Another bad design that really shows off how bad it is when you build an Assassin Tank and get far better results than building the Assassin... Assassin
Reasons: Not necessarily a bad design, but it is a little stale/boring and could be a lot more unique than "Im gonna pop onto you and kill you then disappear," which is essentially the only thing Talon does other than occasionally throw some spiky disks at you from a moderate distance
Reasons: Extremely toxic design that is almost made to be aggravating to play against. He has been out for a while and has gone through several phases of strange, niche builds that make him OP for a moment before Riot is forced to nerf him again
Reasons: Similar to Rengar where she either stomps hard or is left extremely starved. Some feast or famine champions in the game is ok, but Katarina and Rengar are way too feast or famine for their own good
Diver
Reasons: An almost naturally broken design, being a basic attack based generalist with insane sustain who is feast or famine. How does that not just scream feast or famine, too much for Aatrox's own good
Reasons: Pretty out dated kit with annoying point and click poke and stun, plus having most of his damage packed into his E. His R is good though as an ability
Reasons: Is really just outclassed in what he does by a bunch of other champions and could be more unique with much more focus and vision control and the Fear mechanic
Reasons: Another out dated design. He is really basic, too basic really. He either jumps onto an enemy and destroys them like the nuclear missile he is, or gets affected by CC and instantly dies with little chance of survival unless fed. He has a lot of feast or famine elements
Reasons: While not as bad as Fizz, Irelia is pretty annoying to play against with her stun basically punishing the enemy for winning a duel against her and her Passive punishing enemies for not dueling her with that insane Tenacity
Reasons: While not extremely toxic, bad designed, or even stale, he could be a lot better champion if he got some above average touch ups. Right now, he is similar to Xin in that he either goes in, kills everything, and wins or dies instantly. Not quite as bad as Xin at this, but somewhat
Vanguard
Reasons: Riot have stated they want to push Sharner away from being a Juggernaut and more into being a Vanguard since that is where he should be, hoping this is his last rework that makes him a good and viable pick in times other than when he is very OP
Reasons: She has a pretty bad kit, currently just being considered almost a "Knock Up Bot" along with the benefit of Tremor Sense. While that's cool, it makes the rest of her kit other than Burrow and Unburrow a bit lack luster. So much more could be done with the idea this champion fills, but it isn't done to full potential currently
Reasons: Currently, Amumu is in a bit of a weird spot to where he has a good design and such, but his kit is easy to avoid and such once the enemy gets better at the game. Plus, his play style is pretty stale, boiling down to Q+R in majority of team fights, then hit W once and spam E
Reasons: While not having the worst design, it is pretty bad. While he can be built Tank right now and be used mainly for CC and soaking damage, like a Vanguard should, he really is just used right now for his innate extra tankiness and that super burst damage from building AP with his REQ combo
Reasons: Im mainly just saying this because Riot themselves said they wanted to give him one, which I can see why. He is a little stale right now and could be so much more
Warden
Reasons: Great idea, worst execution possible. His Passive has made him the bane of Top Lane when viable due to his infinite poke and sustain, his W is a really boring spell being just a stat boost, and his E offers little interaction with his opponent, feeling boring for Nunu to use and annoying to his enemy to be against. His Q and R are cool, but the rest of his kit is pretty dang bad
Reasons: I don't care if he is a champion with a cool following, when you are really picked for only using WQ plus some side benefits of your E offering minor sustain, it should show how bad design that is. He is just way too stale and a little poorly designed to be left exactly how he is. His WQ combo is fine and all, but really the rest of his kit feels like it is just really boring. He's a freaking Minotaur for crying out loud, he should deserve a better kit than "WQ plus some"
Reasons: While a valuable pick and decent design, he is a little weird in that he offers a lot and maybe too much. Instead of being a bit of a generalist, he could be more focused in one area, like defending his team rather than being both a huge offensive and defensive threat due to his generalist kit. Not a huge rework at all
Enchanter
Reasons: While I love a champion being picked in multiple rules, Lulu is one that is mainly put into other roles because of the abuse her kit brings to champions in said role. She isn't much of a Support and more of some weird Mage hybrid that is probably better off supporting herself with the option of some ally support rather than the other way around
Reasons: Riot has never really been able to put Sona in a good state, not liking her passive aura strengths offering gameplay with little direct interaction. This could give them the opportunity to nail Sona into a place the community likes and they also like
Reasons: Decent design, but is she really at the best place she could be? If feel like she could be in a better place, especially with her W being similar to Nunu E in that it is little interaction and just a guaranteed slow, this time scaling as well
Disruptor
Reasons: While his fan base is loyal to him and loves him, the rest of the community hates to go against him and it is understandable. His turrets are annoying to deal with, especially when he just places a new one right after you kill it. Some tweaks could really help with the annoying nature of Heimerdinger while also making him more viable in higher level play
Reasons: Again, loyal fan base but everyone else hates him. Almost his entire kit screams annoying and he could really use a rework to strengthen his identity and make him a viable choice in higher play. For being the game mascot almost, he is hardly seen in-game and is usually considered weak by those serious about his power level
Reasons: Not that she is bad, it is just that she could be better. Her kit is a cool idea, but is a little boring right now, especially her Passive. Maybe have it still be sustain, but maybe more interactive and interesting than just some free stats
Reasons: Another champion like Morgana to where her current kit is cool, but it could be better. She is a better "Pet Commander" champion than Kindred (wow), but could be better still in giving her ball more to do than move, shield, and damage enemies. While changes to increase her complexity might make her even harder to play, I feel like that is something that should be accepted in such a champion like Ori and be welcomed so that she can be a better champion overall