I'd like lvl 10 weapons for certain factions, and only if it made sense.
Fact is, space isn't fair. Xenos don't have it fair, yet they still have an impressive player base. Advantages and disadvantages make RP more flavorful. Liberty will always be a fear inspiring war machine. The GMG will always be a stealthy, hit quick with superior tactics faction.
Not all factions have capital ships, either. We wouldn't make it "fair" by giving everyone their own cap fleet, so why would we do so with weapons? Someone suggested custom shield busters for every faction. That didn't fly. I don't think this will do any better.
But really, some more lvl 10s would be nice. The Corsairs have their Colada, but not many other factons have any lvl 10 at all. Something like a secret development available for the RM would be interesting etc.