I know its this guy again. Or are they still the same? Just manned turrets and the repair thingie? My guy was an engineer and i feverishly waited for cool future tech thingies to be added. You know..Nanites.
Actually, they just posted that the Engineer is likely to update in July. https://forums.station.sony.com/ps2/index.php?threads/july-tentative-class-update-engineer.106315/
They have magical guns that can fix any synthetic material without even pointing directly at the damaged area.
Engineers are great at defending, you just need several of them to all set their turrets up correctly, and then anything that enters that room is dead. It's enough DPS to take down maxes, hordes of infantry, etc, plus the turret shield to protect you I think that makes them "cool" enough. The class certainly doesn't need any buffs