1. The Lag. It seriously needs a patch, but I suspect that is already in the works.
2: The Friendly AI.
Let me spell that out for you.......
FIX THE FRIENDLY AI! FIX THE FRIENDLY AI! FIX THE FRIENDLY AI!
FIX THE [censored] FRIENDLY AI!
Because it is totally unfair as it is. The enemy AI is a semi-coordinate, efficient machine that knows exactly what to do, can kill with alarming efficiency and actively seeks out new objectives. The friendly AI on the other hand is a brain-dead, near catatonic mess that makes the Imperial Storm Trooper Academy look like it churns out the perfect soldier. They can literally aim at a wall and miss. Unborn children would make more effective teammates than the current friendly AI.
Either make them work on the same level as the enemy AI, or just below them. Not on this "So bad it must be on purpose" level. Its not fun, its not fair, and it doesn't make me (or anyone else) want to play when you know you're going to have to do the work of 8 people by yourself.