Engines:
The engine thing has been pretty much resolved, by knocking all engines down to the same size (roughly). In all my tests this seems to be working very well
10,000 Ships:
Heh, I wasn't actually hoping for that many ships, not without an equally large fleet of administrators to watch over them. I was just hoping for slightly larger fleets with less maint cost. As PvK said, we don't need fleets of 1000s of ships - and ships can represent squadrons. In my test games I only had a few fleets of no more than a score of ships. As SJ said, we get it working first then scale the maint.
Joe Public:
Well, I did ask for your opinion
Yeah, the goal is to make it easy, fun and ultimately mergable with other mods.