The reason for the rework is that some planets like Uranus really have no use outside of niche scenarios (like with pants for 2 pair) and that you're better off just pair-maxing the whole game. If Uranus gave the +1 mult and +20 chips as it does now but Mercury only gave +15 chips, I'd have a reason to take it.
(This is assuming that blue seal doesn't get an insane nerf: I know it's being nerfed in some way but this is balancing around the game as it currently is)

because it should give less chips instead, or because the planets are fine as is?