So, I have several suggestions that I have been thinking about that would improve the gaming experience.
1. Moving production: Within the same star system, the planets may lend their production to their neighbours (with a small loss of say 25%). This to symbolize what the industry today call outsorcing and letting another planet take care of making the small part for example the death star. The loss in production is because of the transport cost. With this implemented you can really build production clusters and the smaller planets could help the big planet in a star system.
2. Moving population: The ability tototally empty a planet of population, either a certain type or everyone. This way you can make a certian planet only having one species or even be implemented as some sort of scorched earth tactic if you allow for blowing all the buildings. To use it as a bridge, the AI has to recolonize the planet.
3. Moving orbital installations: Why not let orbital installations be moved within a star system. This could even be a tech in the tech tree (Call it: Empowered Tugboats) This way you can let a production strong planet that newly settled a smal neighbour instantly allow the small neighbour to have a an orbital installition. To not make this tech to powerful, allow a transport period of 1 round per "distance" within the star system.
So, what do you all think?