The problem with trying to implement more stealth heroes would be working on the other spells to make it such that the hero's skills aren't desync-ed or anything. Also, we also need to make the effect original. Evelyn's stuns and damages if behind (haven't played her for a long time, could have been changed) while Twitch's increases his own attack speed. Now tell me, other than these two, what other effects can be implemented after breaking stealth? I'm not against the idea, but I'm just mentioning that originality in both spell and hero theme is needed.