Possible Gnar change

Riot want Gnar to be unreliable in his transformations so he can't abuse either of his forms (his mega having insane cc and teamfighting ability, and his mini a mobile lane bully), however I think it would be sweet if he could have a mini ult which was a healing rage-cool-down (a little like Trynd's Q). It would keep up his sustain in lane and have the same time gap where you couldn't gain rage again like you transformed back into mini. His transformations would still be unreliable but at least you could sometimes keep your mobility in some situations. Unsure on a cooldown however possibly it could be half the GNAR! cooldown? Thoughts or ideas?