Let's chat about exhaust.

I remember how riot nerfed cleanse because back when it removed suppression you would always take it against those champions and then they changed Qss to not remove the debuffs of certain champions because it made them harder to balance. Exhaust is kind of doing the same thing now isnt it? Even if it is to a lesser degree it's pretty similar in it's use. Regardless of how I would talk to teammates so that I can be in a counterpick position even if my opponent picks some squishy mage mid and I go Talon or Zed it doesn't matter because they can just snag exhaust and boom guaranteed safety on an all in that I try to do because it either reduces the damage saving them or I have to back off or die. It really sucks to have to position correctly, avoid skillshots, hit skillshots, then burn multiple cooldowns just to have this final uncounterable wall hit you because there is nothing you can do about this button press.

Worse there is almost 0 decision making with exhaust. Someone going in exhaust them. That's it the math is done. Enemy assassin managed to get through the entire team? Well boom exhaust. Now the adc can either point and click them to death while lifestealing back any damage you may have done or you can burn your escape and walk around useless for a while.

This spell needs some changes because as it stands it punishes certain champions way too hard for a playstyle they are built around.

Edit. Also it really overshadows barrier because why take barrier when exhaust does a similar job + more? There is one offensive use of exhaust and that is exhausting an opponent as you go in on them but you rarely see it used that way.