Your W can always move back there if the marriage doesn't work out.
Good luck with the arrangements for the move. Maybe you guys can try to make this very positive like a new beginning... even if it's in a place you've been before.
BTW, I totally agree with this statement:
>>Because if we stay together while she figures it out, I'll end up being the WAS if/when she figures it out. And at this point, I'm not a LBS turned WAS yet, but it's getting close.<<
There is no arriving, ever. It is all a continual becoming.