The Announcer occasionally says things that have nothing to do with what you're doing (like Killing Spree even though you haven't gotten any kills). He also repeats the game status a few times (like "Game Over, Tie! - Game Over, Tie! - Game Over, Tie!").
After a match is over when looking at the Spartan Hub, your player model is either Baby Blue, or "Lightish Red" according to what team you were on the previous match. You can't change the armor, or color, and the model is low resolution.
The Carnage Report sometimes carries over from previous games, and won't display what happened the current game.
Matchmaking kicks you out allot.