Lets imagine you could exchange one of current locations of the Masters 1000 tournaments by another one. Just one, and by another already existent ATP tournament, 250 or 500.
Personally I would take out MS 1000 Paris and replace it by London Queen's.
No, AMS Paris has great history.
Rather move MS Shanghai, upgrade Queens or Halle. Put carpet back on AMS Paris.
Not gonna happen though. Shame that we've lost an entire surface on the ATP.