The point to Elusive Mind is to free up a stun break in your utility slot, giving you the choice of actually switching it up in terms of playstyle, the way it currently is now is pretty counter intuitive from a design standpoint. honestly I would like to see the exhaustion removed from Elusive Mind, however to balance it out I'd like to see EM on a cooldown based system just like any normal stunbreak would have. Personally I don't think a 20 second cd is not too much to ask for for a grandmaster trait. In terms of knowing when EM is up, just simple change the color of your dodge bar to blue when it's off cooldown so the player knows when it's ready.
When it comes to the argument of dodging while cc'd, personally I wouldn't mind giving that exclusively to Infinite horizon, thematically this makes sense as well. What better time for your illusions to perform an ambush when you're being stunned etc. That way both traits are strong, but also aren't over the top. EM gets a stunbreak every 20 seconds, and the mechanic behind dodging while cc'd moves exclusively to infinite horizon. Obviously if this were to go into effect something would have to change to dune cloak....lets be real it's pretty underwhelming compared to the other 2 traits currently. Let me know your thoughts, thanks.