I find that (the limited options for tweaking mouse settings doesn't help) it isn't as good as quake 3 or even doom 2016 in that aspect i.e. in some LG battles I've found moments where the mouse just won't respond as I want.
The waiting/joining games stuff I believe is done so as to keep the pressure off the backend in beta to better give everyone a chance to get some rounds in rather than saturating the relatively limited backend in beta compared to the hosting that would be in place when it goes live.
Personally I kind of like the abilities despite being relatively a quake purist - 1-2 need tweaking so they don't cause hard to anticipate instant kills but aside from that I like the extra flavour.