People are complaining that the space ship is to hard to build. It takes too long to research and costs to much resources.
A simple solution for this could be a spacer starting scenario option and adding new research to help obtain resources and refine them. The spacers would easily get this new tech to aid in getting the ship faster, while tribal and colonist scenarios would remain the same as the added research for the new stuff wouldn't be worth it for them.
I'm on board with a spacer scenario, for the sake of completion.
Using "Too hard to research ship construction" as an excuse for that is garbage, though. Even with only one dedicated researcher in a tribal colony, you'll have every tech researched in less than 5 years, and advanced components are more likely to be a limiting factor than research ever will be.