I don't really view the tiny hull as a fighter hull.
Fighters are generally not built with particularly long voyages in mind. Which is why they're completely reliant on easily accessible refuelling and rearming facilities.
Each ship you build in GCII has the facilities to spend months in space and travel interstellar distances. Just look at what you have to put on them in game; engines capable of faster than light travel, life support and lifesupport. It just doesn't promote the feel of being a fighter jet to me.
That's just my rather uninformed opinion however, never even played the beta so what would I know?