I play on PC, btw.
Minor complaint: Imbalanced objectives, specifically escort objectives. I'm not saying it's impossible, but even if you have a good team composed solely of medics, escort missions are still rediculously hard to win from the attackers side, the defenders have it easy, as it takes only a few bullets to kill the NPC being escorted. This is an easy fix: buff the health. Make it so the NPC (forget his name, starts with an N) has the health equivalent of an engineer's turret, that way it requires actual team play to down the objective, just like it requires team play to revive and escort him.
Bit more serious of a complaint: Is it just me, or does the gameplay feel overall very choppy? On low ping servers it's a bit better, but still it's choppy and laggy. As an example of the choppiness, ever try holding F to pursue a teammate to buff him? The screen shakes, the character shakes, everything shakes, the movement is choppy. But it isn't only when you hold F to follow a teammate, it's basically anytime you do more than just sprint with SMART. Hopefully this is just some small speed bumps that will be smoothed out in future patches, or when the servers settle down and overall it's less laggy.