Having played Galactic Civilizations III it seems that the number of buildings one can put on a planet is quite small. Planets should be much larger (and have a greater number of workable tiles to match), perhaps with 10x the number of tiles that they do currently. Additionally to add variation to the game the different radii of planets should have an effect on the number of tiles and thus the planet quality of the world. Implementing this feature would allow much more to be done with adjacency bonuses and the like than can be done now.