One thing I've proposed in the past, which probably isn't what the OP is asking for, is introduced more ships, but make them only available to NPCs. For me, more ships isn't about having a giant collection of every ship in the game, but rather the diversity of encountering more ships while flying around. This is already the case with the Cobra IV, which for me is only available for NPCs, but I do like seeing and even fighting them, even if it is just a ripoff of the CM3. If some NPCs start flying older ships like the Boa or Gecko, I would quite enjoy that, even if I myself can't fly them. It's like driving down the freeway and seeing an old Delorean or MG Midget - it's pretty awesome. And I suppose these could be made available to pilots as well, as collector editions, like how some people collect old cars today. Perhaps such ships could be only available via exclusive missions in very select systems rather than selling them at the "dealership" like a modern car ship.