Go on Google, and type in "Solar System Moons", and see what you see. The majority of moons are either grey, or beige. Of course, there are some rather glorious exceptions. Searching for moons makes sense, as most Sol PLANETS are gas giants.
Its hard to say what the long term dev goals of Frontier are. I mean, forget about 2.4, whats planned beyond that. I guess as ever, there are different camps on players in Elite. Some want pew pew, some love to explore. I like a little of both. But I have to say, what I really enjoy is visiting virtual alien planets, and moons. The more realistic, the better. So Im all for more colour variety in planets/moons. But I guess we also have to accept, based on our system, that most rocky planets will just be grey, and pocked with craters.
Others, though, because of tidal forces, from a larger Planet, or really large moon (like earth) will have tectonics, and also maybe atmospheres. These seem to provide the most variety. Venus with its super yellow atmosphere, Titan, with its blue atmopshere, and what looks like water oceans. Io, with its yellow sulphur deposits. Every now and again, it would be really great to indeed find planets of this calibur of variety.
And I guess thats the crux. Having blue, green or purple plants, and some other colour craters is not going to cut it for me. Hopefully, Frontier are working on this. But just how many resources. Who knows. Maybe we just have to be patient on this, and look at the long game.
Personally, Id be more than happy to see less Headline features such as Multi-Crew, and more of a focus on raw asset generation, and planets types / surface features / assets. After all, Im sure we all really value the extra variety that has been added recently with station interiors (IMHO loooong overdue), and the mega-ships are another example of variety, that I really applaud. I'd LOVE to see more variety of the topology on planets.
For instance, I was checking out SC the other day, and they have a working deep cast mine system for planets, not sure if it was procedural, or hand crafted, but this kind of thing is exactly what we need. Would love to see mines like this on rocky planets, with large diggers, and a nice industrial looking star port, carrying ores out.
You know scenery, it really improves the feeling of ED being a living galaxy. But I guess its hard, as Headline features are possibly a little easier to market, and get more £££ in for development. Tricky....