Maybe, but I’m not sure it would help much. Great for a small forum of <50 people, but imagine you have 1000s of users… Scrollable list won’t help much (and not sure if technically even feasible).
I think I like your other idea of somehow adding more actions from the user list better. However, that of course would be a much bigger change than UX.
Either way, I agree it could use some TLC.