I'd rather see more clan-centric gameplay. I often don't have time to play a lot and 1uP lost a few of its players because there weren't enough active.
Add a clan bank (preferably with the option of auto-payments) so people who can't play all day everyday can indirectly help out when they aren't around.
Transferring planets between clan members would also be an improvement. Likewise it might be a good idea to prevent intra clan sharing of the first prize planet a clan gets. Perhaps make it a special "home planet" that cannot be shared and gets extra IP bonuses? I don't mind clans giving planets that they earned, but the freebies really give an unfair advantage in the early game.
When someone leaves a clan, the clan would retain the IP and planet control while the player loses everything. This would prevent a lot of shenanigans and improve the clan part of PW.