Why the assassin rework didn't make assassins viable again.
Assassins need to be in the mid lane, against ranged opponents constantly. Riot thinks it's fair because mages are immobile but if you've never fought against a mage with an assassin and gotten poked down by auto's for 5 minutes making you have to back early and basically lose your lane then you have no right to say it's fair.
Assassins are forced to always play from behind because of the massive difference between range and melee in lane, they miss CS very frequently because if they get to close the mage will unload on them and kill them. This makes Assassins goal of dominating mid game almost impossible because of how far behind they are compared to everyone else.
If we go to Leagueofgraphs we can see a trend, Ranged Assassins such as Leblance and Ahri have these winrates
Leblance: 50% Ahri: 53%
Along with pure mages that have these
Annie: 51% Vel'koz: 52% Viktor: 51% Brand: 52% Syndra: 50% Kennen: 50% Twisted Fate: 51% Cassiopeia: 50% Ziggs: 53% Xerath: 51% Swain: 52% Anivia: 50% Lux: 50%
The mages that don't have above a 50% winrate have been nerfed, have poor match ups against other mages, or simply are too hard to play.
Ryze(hard to play): 45% Vlad(nerfed): 45% Heimerdinger(poor midlane matchups): 48% Orianna(hard to play): 49%
But melee mids have this winrate
Katarina: 47% Zed: 47% Talon: 46% Fizz: 47% Diana: 49% Ekko: 48% Akali: 46%
So basically if your a melee mid laner you're less likely to win against pretty much any ranged mid laner except the nerfed ones. The assassin reworks aren't the issue here, it's being melee in general that's the issue, look at jayce's winrate up top he's winning because he's ranged against a melee champion. We need to include a mastery that only melee champs can take that makes it easier to farm or an item that all melee champs can start with that makes it easier to farm, not everyone can build tiamat and be fine ya know especially when it comes to AP mid laner's. We need a change that gives melee champs a chance against ranged match ups, the goal isn't to be able to kill them, but to be able to farm on equal playing field with them.
Edit!!!!!!
Okay so just had an idea, what if tiamat actually built into a melee only AP item, that way the AP Melee mid laner's could still build tiamat and have an AP alternative. I think that would have been a GREAT addition during the assassin rework and it is preseason so hopefully riot consider's it. It would definitely help the AP Melee's and would certainly be a nice addition as long as we keep the stats it gives in check (don't want it to give HP for example cause we don't them being to tanky.)

is now)
feel great.
are strong af.
is the only one im unsure about because she is now really damn hard to play properly.