I recently played the 2.2 beta and...
its fucking awesome! way to go devs!
-Arena kicks ass!
-Generator is pretty fun.
-Reload makes the game much more enjoyable. (although its such a habit, i need to adjust

)
-Sniper charge is great.
-Medic seems to have been buffed, but maybe its just the new healing radar, that shows who you are healing.
Best part of the update: Being able to back stab without having to be on the ground. This is the best thing to ever happen to the spy. It makes him so much fun to play!
One suggestion that someone will probably mod anyway:
Reload sounds, so you know when the bar reached the end, just like the soldier reload mod, but for every class.