User blog comment:LivesByProxy/For The Love Of Stealth/@comment-24055932-20160103003922

Overlays promise to be a neat visual experience, but in terms of functionality this might prove harder than it looks like. Randomness is to be avoided, and luck shouldn't be an element of an ability either. And how do you handle the minimap? And is the overlay an overlay for the ground, or the screen? And last, but not least, what if there are multiple people gaming next to each other? Cheating by looking on your neighbours screen is beyond detection.

The next problem we have is the importance of stealth in the different kits. Strip it off of Rengar, and you got a useless champ, while Vayne still retains most of their power. Worst is, the differentiation isn't even somehow related to melee/ranged (as in, stealth for melee --> important; stealth for ranged --> neglectible). Therefore, counters to stealth have to be rare, there must be a strict limit as to how many a team may have, and who should have access to those.

Generally, utility is something you would hand over to support and mage. And as stupid as it is, with both have their stealth detector, and a powerfull one at that. Now set up some wards and know how Rengar ults, and the mindgame is on.

Still though, Rengars stealth ability is the only one of the ones in the game I see as overpowered. He's the only one who can move in completly unseen, ignoring all the vision you placed carefully, and assassinate you within the blink of an eye. Especially with his ridiculously low rank 3 CD, his insane leap range with Cannon, the half a map range and all-vision.