Happened to me in a game where I believe I was in yellow just behind our Guardian, I ulted, kinda missed the enemy and got stuck in a corner wall where I was unable to move or do anything (wasn't enemy hero was up against an Infernus)I was stuck there unable to do anything.
I like the idea of fully melee/axe/sword heroes maybe give them less damage, more speed.
Also like the idea of heroes who use a magic wand or staff.
Another idea is someone who throws and uses cards (a little like Gambit)