I can't wait - well, I mean, I am waiting until Ultrablast updates GCW, but I am enthusiastic about trying out the vulcan. I will have to see how much energy is consumes, but I'm imagining a tiny fighter-sized wall with heavy armor and shields that keeps enemy shielding collapsed.
BTW, I've been experimenting with wall-style arrays of fusion cannons, they might need tweaking to perhaps lower their firing rate? More than one cluster of 3 cannon ends up being a thing that eats ships.
The only downsides to the situation is that I have to get close enough for the enemy's weaponry to hit me, and that fusion shot are killable by PD. I don't think either of those things need changing, and are generally responsible for almost all of the balancing fusion cannons have.
But, with the firing rate set at it's current level, it's fairly easy to amass enough dudes and power plants to punch way above your weight using fusions. They are just monsters.
I have had a hard time getting a good design built around the Mass Driver. For all of their awesome parts penetration, I've had a hard time breaking shields with them. Being able to up the range and damage with booster parts is nice, and I really like the idea of a 1-wide axial weapon to design a ship around.