I dont know if it's been brought up, but the cooldown period for the ammo synths is fucking ridiculous. I personally think that there shouldn't even be one, but since that isnt the case, the timer should be 30 seconds at the very least. Not three minutes or however long it takes. We were taking on that boss Primus-something on Mars last night for the Queen quest and both my friends died and since you need buddies to revive, I wasnt gonna take the chance to go get them because they were right in the middle of the battlefield and I didnt want to restart the checkpoint. So I hung back and found a safe spot to take sniper shots at the dudes head which eventually led to me running out of ammo a few times, loading a synth clip, unloading and then having to wait and making my friends wait until the cooldown period was up. Just plain old annoying all around.
Killed that boss with that method though. Good times.