Gna-R-
So... I'm pretty sure a ton of people have the same grief with Gnar, while tons see he has some pretty awesome potential, the fact that his transformation can't be triggered drives everyone up the wall. OR, everyone has the situation where they're in a teamfight and say, "Man.. I would love to use my Ult right now," but can't... at all...
....So....
**TL;DR Why can't Gnar's R transform him if his rage is maxed? **
Simply.. Lvl 1, has 1 Rank in 'R' to simply change him if he has the rage to do it. Lvl6 and the levels after go towards the normal function of 'R'.
How is that possible? Same thing with Twisted Fate's Destiny and Gate. Press one to enter the mode, then Press it once more to activate "Gnar!"
I still think attacks should build rage, and it should deteriorate as well.. Heck, given it can then be activated, I would even agree with rage deteriorating a little faster than it currently does.