What if Garen Q grounded instead of silencing?

It keeps the thematic "No running away" but reduces his reliance on preventing enemies from fighting back. Allowing enemies to right back would make it possible to put more power in his e or somewhere else.

Just a thought I had, his Q is pretty clearly supposed to give sticking power but it also makes it harder for enemies to hit him back, which isn't as mechanically appropriate (Garen welcomes your return blows with his w and his passive, as long as you stay close) or thematically appropriate (a giant sword to the head would make it pretty hard to run anywhere).