[Suicide Junkie]

Well, P&N does encourage a wider variety of small ships.
I didn't add many new hulls, but the game settings do encourage it.

Eg: Speed 12 Escorts used as scout ships in the first turns.
Due to QNP, small ships are almost as effective as larger ships in combat, so warships tend to be smaller longer.
QNP also allows for variety of balanced designs; fast interceptors, lumbering assault ships, heavily shielded fortresses.