I don't know if splitting the xbox from the PS3 community would really solve anything Shin... but I know what you mean about unwanted elements.
Honestly, I think this is the perfect setup.
We've got the super-casuals on doaw, the hardcore on fsd, and the mentally challenged on tkp.
It's reminiscent of the neotaku/doacentral/doatec love triangle before neotaku and doatec collapsed, only now we've got the hindsight to deal with the bullshit. So much drama can be avoided, and we can take the people who actually want to be a part of the hardcore community as opposed to casualite refugees who have no business picking up a controller or stick.