Here's my contribution. First off, in this game, at least, there's nothing so devastatingly effective as the four 30mms in the ME-262.
If I could propose a firepower package, I'd propose a TA-152 with two electrically-fired and -synchronized Mk103 cannons in the wingroots, like the 20mm cannons are right now in the other FW-190 models, and nothing else. With two high-velocity, laserbeam-like 30mm cannons in a close-to-cowl mounting, who would need anything else?
I realize the barrels for these would stick out a bit from the wingroot. I'm OK with that. ;-) These guns are pretty darn heavy too, so to save weight I would not mount any guns in the cowling or through the engine.