Indicators - Should they be updated?

Specifically, I'm talking about two indicators - For Evelynn and Rengar.

As we all know, if either of these stealthed champions are near you, you get a yellow exclamation point over your head. It's a decent mechanic that allows some counterplay against these champions.

I'm wondering if, should we give these two indicators a slight visual upgrade? If these two champions were against you, you may not know if it were Rengar or Evelynn who's near you.

Another reason I bring it up - Riot may want to use an indicator on another, yet to be released champion. Who knows? And the normal '!' would become utilized by another champion.

I think we can just nip this in the bud right now. See - Warwick.

http://i.stack.imgur.com/6zvD7.png

Warwick's indicator is unique. Now, this is different than Evelynn and Rengar, but I feel like we can draw inspiration from it. Simply, Rengar's indicator would be his blue and yellow eyes, perhaps with a green, leafy fog around them. And Evelynn's can be her seductive, red eyes, with blue, smoky fog around them.

I think it could serve to make these champions a little more flavorful, and maybe have a little more visual impact.