the question you have to ask is will the investment in implementing such a thing reflect the benefits?

yea customizing your home planet would be nice. if you think about it its factual to because that race has been there so long the planet proably affected by them. as for other planets, be cool to design continents in the shape of your name. as for it would take to implemeant this... im just guess but the code for this would proably be alot to put in. (cough Galciv II expansion cough)

A very small thing and I am sure it is not in the first release.

While a few planets, like the near home world 4-5 PQ (Mars), are capped at low quality, the majority of 6-9 PQ will wind up being at least 10-11 after planet improvement.

It would make sense if the look of the planet changed if the PQ goes high enough. It always seems a little odd adding farms to the ice and desert planets when they have improved to over PQ 10.

Like the UI change that may be brought back later it might be something to think about.

I would think it may be possible to add custom-textured planets (non-random), considering that Earth is (and I think Mars too), but then again that one alone may be hardcoded. You'd have to check with the devs on if that's possible to do without modifying the code.