One thing I'd like to see is to have planetary income listed with trade/refinery income. There really is no need to use 2 lines for the same planet, just to show 2 values.
Something like
Homeworld: 12.7___3.6
Asteroid A: 0.7 ___3.6
World B: __6.8___14.7
Would work just fine. At least, it'd double the amount of planets that could be viewed at once.
Better detailed views could be done in the diplomacy menu.