I agree, It would also be great to see particle effects such as the ones in the Collision FX and Reentry FX mods and rumbling sounds such as the ones shown in the KerbQuake mod as well because it really adds to the sense of risk and accomplishment.
Another great addition, in my opinion, would be to include a stock dynamic and somewhat realistic weather for atmospheric planets, with storms, clouds, sandstorms, tornadoes, extreme weather and that sort of juicy stuff, which would also make landings, exploration, building and colonization so much more challenging and fun. Also imagine having earthquakes, volcano eruptions or tsunamis. It would make quite a difference, and new building parts would probably be required to make colonization possible, and each planet would be unique, maybe I’m just asking for too much, but I gotta say planets in KSP 1 felt kinda boring to explore, even with mods.
