On Apollo, it was configurable what swipe actions did what.

The way I set it up was swiping right (icons on left) had upvote at a short swipe and save at a long swipe. Swiping left (icons on right) had collapse current comment at a short swipe and collapse entire comment tree from top parent at a long swipe.

I believe everything, no matter what you personally configured, was in the ... menu as well. Since I rarely would downvote, and reading and saving/upvoting was more common for me than replying, I liked having the freedom to choose this setup. I think being able to customize the swipes similar to Apollo would allow more people to choose what works best for them.