While it's likely that this has already been suggested, I'll put in my two cents. Ascendancy has a very useful feature that allows you to see a list of all the planets you've discovered, but not yet colonized. You could sort the list by planet size, type, its version of FIDS, etc. It made it very easy to keep track of your most promising colonization options. Would love to see this in what is already a great game. Thanks.

You're right, it's already been suggested here: /#/endless-space/forum/28-game-design/thread/12568-discovered-planets-data-window

This thread has been linked to the former and is moved to the archives.