Truly, the SG7, or was it 8 version of the BCE is the best most balanced version ever. Its not over powered... but its problem lies in cheese. Once droned PF's are out, the BCE with it's lousy PD gets overwhelmed. Even carrying PF's it aint that hot with all the other/better cheese. The answer is to have the BCE come out earlier... And that's be a bad idea because the counterpart to the BCE is the KCR. The romulan front is the best operating front the BCE has because the klinks edge it with their fast drones.
The BCE has a niche in a fleet battle, although with fleeting rules, a small one and even smaller is the window of game time in years it is competitive before being outclassed. It's fun to fly, but without the cheese to take down AI fast, it's a slight liability for doing AI DV munching. However... for a short time... the BCE is a formidable opponent in 1v1 with the right captain. Unfortunately, few know how to fly it properly. It really is a neat ship, but to mod it anymore, you risk overlapping and over doing the other FBC variants.
I'm not sure what else an SG BCE can be without turning it into something it shouldnt be. But GL!