I think FD adds new ships based on what the majority of players fly.
FD adds ships based on what was originally intended on dec. 16th, release day.
25 ships were planned for release, they couldn't quite make it. All that is happening now is still "catching up" on the original plan.
And that's the misconception, that new ships are added based on anything else but THAT.
The new announced goal, just before release, is now 30 ships.
And before we have ALL of them added to the game, we can't reasonably discuss, if there's too many of one size or too few of another size.
The same goes with the pricing, there are "gaps" because we're still waiting for more ships to slot in.
All these discussion evolve around a very short sighted "here and now" snap shot.
The real status quo is only established once we have all 30 ships, and THEN we can discuss what's missing.