Problem not in it being big or small. Problem that its light, so supposed to kite right? Attached picture shows that this battlecruiser have almost worsest ass projection for it. All its shape asking for frontal attack or broadside, for which it have not enough firepower. I think this is why players feel it big - too weak for assault, too fat ass for running.
Proper solution probably will be remodelling in longer craft (to remain similar design) and turning it in proper med/heavy. Problem of this solution obvious - find who will do it.