Having played through SA 3 times now since launch, this mod is awesome! I just want to echo what these people are saying though. Having the end goal being to launch the rocket using all of the new science is great, but then also having to create a platform that can withstand the space edge or some distance to the shattered planet as a winning condition (or extra winning condition) would be sweet too! All good if it's not in your vision since this mod is already awesome.
It may still somewhat be in your vision as it still fits the "all the new Space Age content minus the other planets and interplanetary logistics" description... no interplanetary logistics. Just building a cool platform on Nauvis and sending it off to the shattered planet. Again, good stuff regardless!
Maybe just an optional startup setting that changes where the winning condition triggers (which someone can make as another mod so I definitely understand sticking to your vision.)