I could take that one step further. I don't want any WoW folks back on UO. They left, it's their loss, and the last thing we need is for ungrateful folks to come, ask for stuff, and then leave again for WoW.
Speaking from a PvP point of view, if they can't see that the PvP in UO is better, then that's not the kind of folks I want back.
Btw, I looked this up, it's not "servers"...it's "subscribers". Blizzard switched to another company to do their work for them in China, and the Chinese gov't banned that company instead. It shouldn't be too long before Blizzard finds another company to work with; after all, with what was once 11 million subscribers, Blizzard isn't going to just sit around and let half of its revenue just disappear.