that sounds like a clever idea.

and i also think that it's good cause then there will be emotional scenes like when the doctor will need to fix the universe and maybe make the decision on whether to keep the new dimension or destroy it.
also, out of curiousity, do you think the other dimension will have like another doctor and stuff? i know there is a human one in rose's dimension. or will the new seeker-created dimension just have the restored timelords?