(Or the changes some Rioter mentioned, not sure who)
What about if Garen's passive healing began to generate for as long as his W was active?
That would be pretty neat, and definitely fits into his "Never surrender/back into the fray!" theme with a burst of energy like that.
Would also give people the choice of playing him offensively and maxing Q second for the speed/damage, or W for the tank and being able to stay alive longer.
Or what about, if he uses his E while his Q is active (and un-used), he silences everybody that he hits? A little stronk, but it's just a suggestion.
Personally I'd love to see his ult continue to cast if he dies, though, but I know that'll never happen. :c