The icons are all at the bottom (good) and have tooltips (good). The reply icon is conventional, so I don't mind it. However, it's smaller (narrower) than it could be (whether it has text or not).

I understand the voting use case you have in mind; some people may read the comment, then check its rating and vote only if it's "too high" or "too low". And there's a certain logic to having the up and down near the score it will affect.

If you vote independently of the current score, it's fine.