What can be backported to KSP1?
Can any of the planetary bodies be backported to KSP1? They have a lot more detail.
At this point, the best outcome I see for KSP2 is to backport as much stuff as they can, and offer it as a KSP 1 DLC (free to those who purchased KSP2, so as not to burn all bridges)
My guess is that KSP2's PQS system has some procedural generation functions for close up detail that KSP1 lacks, so it wouldn't be a exact copy of the terrain- but still an improvement
I also imagine some of the part models, like the larger landing legs, could be back-ported with little issue.