If you want to make enemies, try to change something.
I am actually fairly dissapointed with Combat Shotgun...It was my favorite weapon in all fallout games (yes even F3) and although it had a short range it had a mean punch... now it just... doesnt! Not even when you spray(and pray)/burst.Also I remember that in other topics devs say that they strive to make the game playable with any build and not just "With the right build"!
Combat Shotgun has similar damage to the 10mm SMG. As I've heard Minigunners whine that they've lost to 10mm SMG users, I'm going to conclude that they are at a reasonable level.
Buff fast shot. Miniguners still can't shoot 3 times with "new" jet. Combat shotgun is good weapon farming stuff. It can work like now.
Perma.