Yeah - really, our first concern is functionality, then it's a mix of visual and realism considerations. Battles are certainly more spaced out for us than Requiem (though, to be entirely honest, I was never really able to get into Requiem so I can't say much); there are still several ships which function best when put directly into the middle of a fight. As far as planets go, there are issues with making planets too big that require the gravity well to be absolutely enormous, or else the "tactical ring" around the planet becomes pretty small and it has a negative impact on fleet spacing and game pace, although alternatively when planets are too small (like the dwarf planets in vanilla) it just looks stupid. I'm honestly pretty comfortable making planets a little bigger than the typical ones (Terran, Volcanic, etc) in vanilla, but not quite massive.