I love Tribes Ascend. I am level 30. It's the only first person shooter where almost every weapon shot feels like a skill shot. That's probably because almost all the weapons are not hitscan and thus have travel time and you really have to lead your shots more so than other games when you are just compensating for ping lag.
Team stacking is a problem in pubs. I think if they added a "random" team joining button, it would go a long way toward balancing the teams. I also wish that they made it easier to vote kick and especially mute players, right from the GUI. Maybe they will eventually. I hope so.