http://www.mediafire.com/download/6plsb23r3t2lhdv/DefaultBlueprintFix.zip

This mod will ensure that the default blueprints balance each ship's defenses again, rather than stacking only one type of defense. Additionally, it improves several of the default blueprints, such as adding interstellar drives to the freighters, and giving every ship a better filler suite. Assault Fighters and drones are unchanged. However, many ships will now add a lot more engines once they get the room, where they often stopped doing so before.

UPDATE: Fixed the Assault Carrier blueprints, which were pointing to the nonexistent EscortCarrierModule. Reworked default Carriers so that they will always add an engine before a second Carrier mod.