Except for that last one I would actually be okay with all of those. As long as they are priced accordingly. Sure the "not good" ones are basically just mods, but they are official mods and guaranteed to work and fit in with the existing parts etc. And frankly, give the level of work involved in making a planet I'd actually rather pay for a single hand crafted solar system than an editor that would inevitably just shoot out generic billiard balls.