I'd first like to thank you, if you are reading this, for creating such an interesting game. Despite some of the bugs and the lag, I can see that a great deal of time was put into this game, and I happen to enjoy playing it.
That said, I want to call your attention to a mechanic that drives me insane in-game. I play primarily as a soldier and an engineer. However, my experience as an engineer has been marred by the turret. At least in theory, I believe that the turret could be a very powerful and important ability for an engineer. In practice, it's nearly worthless. The reason that it is worthless is not because of the damage it does (in the few situations where my gatling turret has actually fired, the damage seemed to be reasonable). The problem is that the turret either never acquires targets, or acquires them too slowly to be useful.
Perhaps I am spoiled by my engineer-turrets in Team Fortress 2, which have a very quick lock-on time. But the turrets in Brink really are nothing like those. My turrets very rarely get a chance to actually fire in Brink. They are vulnerable to quick attacks....even frontal attacks. So long as you chuck a grenade at a turret and fire off a few shots from a decent weapon, you can disable a turret (even if the turret is pointing directly at you) before it has a chance to acquire you as a target and fire. I am not certain how much power the Brink team wants to give turrets in terms of game balance, but when a single person can directly charge a turret and knock it out before it has a chance to return fire, then the utility of turrets is questionable. I've been playing the game since it came out, and I think I have yet to actually be downed by an enemy turret. I believe I've only managed to incapacitate three people with my own turrets in that same period of time...and the only reason I got those three is because they blundered into wide-open spaces in front of the turret and stayed there, essentially ignoring the presence of the turret.
In order for the turret to be relevant, it probably has to be capable of locking onto targets faster. I'm not too familiar with the current damage of the turret, but I'd be willing to see a drop in the turret's damage output if only it would lock on to targets more quickly.