There were a couple issues regarding this topic that have been closed, but I still don't see these messages in the latest available version.

It'd be nice to see more "standard" join/part/quit messages like this:

instead of "Nickname join" have "Nickname (user@host) join"
instead of "Nickname part" have "Nickname part (reason)"
instead of "Nickname quit" have "Nickname quit (reason)"

And thanks for the great client!

Edit: Oops. Didn't notice about thelounge client.