@Riot: The Stealth System - Have you considered Heroes of the Storm's method?

As we know, the League of Legends implementation of stealth is incredibly binary; champions utilizing stealth are either exactly like normal or literally impossible to see, depending on the situation. This harshly limits the stealth systems that are available, and makes certain things like Shaco's Deceive very frustrating in some scenarios but worthless in others. The implementation also has the added side effect of making champions with stealth notoriously hard to balance (see: Evelynn), and ends up being annoying both for the player and the enemy.

Heroes of the Storm, by contrast, utilizes a partial visibility system for stealth. Here's a screenshot, the stealthed champion (hero) is in the red oval:

http://i1.2pcdn.com/node14/image/article/201405/15/20140515051538a0dsb5vzvrk3m05v.jpg

Do you see the slight visual disturbance there, kind of like a heat wave? It's tough to see when the champion (hero) is standing still, but it becomes a bit easier when the character is moving. It still isn'teasy to see, but it has the unique characteristic of simultaneously being hard to notice if focusing on other things and possible to spot out of the corner of your eye if you're being particularly vigilant.

Theoretically, this would provide an avenue of counterplay to the more abusive stealth scenarios (Evelynn being a mobile ward back in the day, Shaco ganks on a blank lane, etc.) while retaining the strengths of stealth in the scenarios where it's actually interesting. Evelynn, for those that don't know, used to be permanently stealthed until she used an ability. She could just follow champions around in the jungle without them ever knowing, and her team could destroy them without her ever even being noticed. If the HotS system were implemented at that time, it would be pretty obvious that a shimmering heat mirage is following you around; you could play around it.

In the same vein, a Shaco gank would be equally potent when people aren't paying attention or when Shaco does so particularly well, but far less overbearing in situations where there's nothing around and he just appears next to you to kill you. It would be possible to see him coming and react, but still very difficult unless you are expecting it.

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I'm curious, what do you guys think?