I have been testing MBH MPistoleer and will continue to do so to figure out what kind of problems MBH has as I do not see the point in changing the requirements for MBH or adding any melee line into it. I believe a Bounty Hunter should be a ranged profession and try to utilize the 3 groups of weapons that are available to you. Light Lightning Cannons are your heavy hitters, Pistols are your DOTs to tear them down bit by bit. And Carbines are your state hitters.
This is what I have found so far.
Spray Shot - Impossible to land a dizzy on a Jedi, tested and used numerous times on a few Jedi. Never landed a Dizzy or stun. Will land Blind however.
Light Lightning Cannon Speed - Much like Commando or Carbineer is impossible to cap the speed at 95 with even +25 SEAs, Carbineer however with BH can reach the speed cap.
Fire Knockdown - Like Spray Shot this move will not land a dizzy on an opponent
Jedi blocks - Jedi continue to block all shots fired even while knocked down on the ground.
65 shots fired at Avara - 55 Block 10 bypassed their block