Invisibility and Stealth
Lets be honest here.
Invisibility is annoying and brings little to no counterplay to those champions.
What am I suppose to do when an Akali drops her W while next to my tower? (before anyone even says anything, I mean still outside the true vision range.) She can literally sit in there and wait for minions to walk by to R to them and if I go to predict that, she can walk over towards Raptor camp drop a ward and jump over to that.
Vayne, becomes a unstoppable monster, the only good thing about her is that she has literally no range.
Kaisa, deals way too much damage and then for a brief moment becomes untargetable too. Like what?
Kha.. Come on, lets be honest here. We all know that the fact he can go through the jungle and not be detected because of duskblade + invis makes him stupidly strong.
Twitch, has a fine stealth. But its still a bit too strong in Solo Queue, where as it isn't very good in pro play. I think riot should take a look at him and buff him for competitive while nerfing his solo queue potential. I say, increase his slow on the flask and increase poison damage (passive), then increase his detection range for enemies. Its near impossible to keep pink wards up with the current assassins and have them around for twitch.
Wukong? If he wasn't in such a terrible state where he has to rely on Duskblade to do the one shotting of everyone. He might have a claim for being broken. But since duskblade is broken. Its not too much of a problem. The only issue with his invis, is that it doesn't let you see where he is coming from, meaning that no matter what if your team mates don't pay attention. He will always one shot someone.
Shaco's invis has always been unfun, but at least in the past it was fair because pink wards made his job harder. Nowadays. Its just Q, Auto E R. Auto Q. And someone is generally dead.
Eve, is the same. The functionality of her hasn't changed at all with these changes. So I don't think she is a massive problem, she gives a good bit of warning before she ganks 90% of the time. Which is a fair trade off. Its like rengar, at least people know that they are about to die which gives them a few moments to dig their own holes and lay in it for her.
Rengar, isn't that bad of a problem. The problem with Rengar is Duskblade. Blackout. Come on really? One shotting Wards? Seriously? With the Sweepers that travel from level 1? Come on. What are you guys doing?
There are a number of ways to actually fix these problems.
1: Create an invisible undetectable ward that last for 240 seconds, 3 up per team. That will reveal all invisible units in its range. And nothing else. Cost 175 gold. This way, its not a very strong ward against normal comps, but is very effective against Stealth/Invis comps. Range is 750 radius.
2: Create a minor rune in Inspiration that gives the support line wards, the ability to detect invis. But only two can be up at a time. So their is a trade off. Instead of getting 4 wards on the item, they get 2. Its a price they pay to detect invis. The would also put the job on the support, but I mean sorry?
3: Make pinks work on invis again? Since we are doing so many reverts recently. Lets be honest, these stealth and invis changes came out around the same time as assassin rework iirc.
But yeah, stealth and invis are extremely annoying mechanics to deal with in solo queue and have almost 0 place in pro play because voice comms.