I'm not sure if this has been brought up before of if it's in the works atm but champions that are capable of going into stealth really need some sort of animation or visual indicator on the champion itself that it is stealth. There have been a few times where an ally Twitch or Eve would walk right past our creeps and right up to a group of enemy champs and I would be like wtf is he doing just to later realize that he was stealthed. Also it would help for Twitch players to see that the steath is off them by a change in the visuals. Sometimes you might just not be paying attention to your buffs and not realise your stealth has worn off just to walk right into the enemies. Just my 2 cents.

wow, i always thought its because my graphics card sucks