Honestly? Earth likes worlds are something I do think we will see and it does not bother me ones bit. The thing is to know where realistic expectations are, I would be happy with water worlds or desert worlds with mild atmosphere and something to do.
I can't see what'd be so hard about modelling the basic planets TBH.
Seems like all you'd need to do is calculate the average diameter of a rocky planet and then create a "ball of water" of roughly the same diameter and then just spawn it in exactly the same place as the planet itself.
The result would be a ball of water with whatever bits of the planet which were higher than the average poking out above the water.
Tweak the settings, randomise things a bit and you could quickly get a range of diverse planets.
Beyond that, maybe give planets a handful of biomes and then texture them with stuff like rocks deserts or mud-flats as appropriate.
And then, if that all starts to make the Stellar Forge sweat a bit, come up with a variety of reasons why a whole heap of planets are just flat-out unlandable, ever.
Maybe some planets have environments which are lethal, or corrosive, or have wacky electromagnetic fields, or high-g, or extreme environments which prevent your ship's nav' systems performing a landing there.
Doesn't seem like ED suffered
that much when Horizons was introduced and the game suddenly had to deal with millions of landable planets so I'm sure the extra burden could be dealt with, especially if they made it so that 90% of the planets were always going to remain unlandable for whatever reasons.