I just backed Exoplanets. Looking forward to it.
I wanted to mention one thing that stood out to me when I was watching the gameplay videos - the planet tiles don't have much visual diversity. There seem to be a few basic types (lunar, grassy, purple gaseous, water), which I understand. But within those basic types it seems like an opportunity was missed to make each tile stand out as an excitingly unique representation of that type. There shouldn't be so much diversity that the board becomes a clutter of unrecognizeable shapes, but I think players would appreciate being able to choose between tiles that look as unique as we think actual planets really are.
The special Kickstarter planet tile is a step in the right direction, IMO. When someone plays that tile, they're going to annoucne they're playing the "Kicktopia" tile, not just a random grass planet tile. I think each planet tile should be unique enough that players develop their own pet names for their favorite planets.
Just wanted to toss that out there.