When looking at the UI for the planet, the difference between arid and usable land can be difficult to discern. Can you have the contents of the hex be grayed or yellowed out to signify the inability to build?
When selecting an ideology, we should be able to double click an item to unlock it. A second double click should unselect what we just selected, in case we change our minds. Instead of Done, can you do a button that is OK when viewing, and Confirm when selecting? Also there is no distinction between the UI when you are able to spend ideology points, vs when you cannot in what is available. Perhaps only show the items as open when you have points available to spend