My feedback for the Arena server:
1) Too many player slots for an Arena server - games feel way too congested for a game mode like this. Also, the maps are relatively small - this is a major annoyance when you have 11v11 games. I don't understand why you chose to do this, because I'd much rather have pure, tactical and vanilla Arena, rather than what I have. My suggestion would be to reduce the amount of players for the Arena servers to something more sensible, like 16?
2) Bizarre glitches that uneven the teams. eg. 8v11
3) The text that tells you if the teams have been increased in player size or reduced is incorrect. My team was increased to 11 players, and the message said teams had been reduced to 8 players.
And yeah, that's all. Please consider what I've said, and report back to me if you've read this.
you forgot the bug when you get spawned in the wrong spawn(no need to fix it, it is fun especially as spy ;P)