I'd prefer moving them to the same line as "reply", putting them side by side, and changing them to "▲ upvote" and "▼ downvote". Adding the text and putting them side by side makes them easier to hit, and moving them down to the "reply" line frees up valuable space at the left side.

To that newly freed space on the left move the "next" and "prev" links, and if "next" and/or "prev" is not available for a particular comment pad its space so if "next" and/or "prev" is there it is always at the same horizontal position.

This makes it easier to skip forward or back a subtree at a time, because after a given click of "next" or "prev" is executed your mouse or finger will be over the next "next" or "prev".

Thankfully the title bar says “unvote” or “undown” so I can know which one I actually hit.

I don't see a downvote button...?

An other issue is the link to your profile in order to get back to discussions you were involved in.

On some phone widths, you end up with the profile and "logout" links right above one another and it's even odds you'll have to log back in on all your device because you'll fat-finger the wrong one and there's no confirmation or anything, just straight fuck off.

No idea why that damned logout link can't be moved to the profile, is anyone really in such a hurry to log out they can't just hit two links?

I have voted for your comment. Not sure if it was up or down though. ;)

oops, i just downvoted that by mistake.

Yes the biggest change here should be making those buttons bigger and less prone to accidental downvote/upvote

Just pinch-zoomed to upvote this :)