It would be very nice if planets larger than 10 Earth Masses could be objects other than gas giants and ice giants. I understand why that's the case, it is realistic, but there are some cases for implementing fictional objects in mods, the main example in my case being Mesklin from Mission of Gravity. Thus far I've gotten around it by setting the period of moons manually and using 10 earth masses, but spacecrafts won't behave correctly in these systems.
Even in the real world, 10 Earth Masses is not going to be a physical cutoff. There will surely be gas dwarves with masses less than that of 10 Earths and oceanias/terras with masses greater than that, though admittedly few on either side. It makes more sense perhaps for the planet generator to spawn gas giants or terras between about 5-15 earth masses, with 10 earth masses being the 50/50 point and rapidly decreasing probability of gas giant as you go down and terra as you go up. So in theory you could have a very rare oceania or terra with a less massive gas giant companion/moon, or even just have ridiculously huge and rare terrestial planets. (I've been using terra in this post to mean solid body, not habitable body, to be clear)
Another suggestion: more reasonable moon orbits. So often we get moons spawning in incredibly low orbits, seemingly unstable with tidal interactions with other satellites, and rarely ever do we see moons at more realistic distances like that of the Earth and Moon.