For example, the turret became a permanent pet that followed you around. Like permanent pets, it could still be ordered to move to a location and stay there, but this would also give it a pet bar with abilities that extend beyond just auto attacking, overloading, and exploding on cue.
If there's any class that badly needs a near complete overhaul, it's MCH. Having the turret follow you around would also make it less of a hassle for doing things like PotD or dungeons where the tank is pulling tons of mobs and charging ahead.