Which is irrelevant because #nochanges went out the window with layering from the beginning. And now they are doing #somechanges that nobody asked for like screwing with item levels and unique statuses.
There is nothing worse about having server clusters (like a benediction 1 2 and 3) cross realm with each other compared to any other change like layering that they have already done. The ability to go to a zone and see everyone on server is already gone. The ability to layer hop to avoid pvp is already here. Anyone who cares about #nochanges did/should have quit years ago.
The only question should be is this something that is a good change that most of the community wants or not. Or even most of the community on certain servers as there is no hard requirement that ALL realms have a cross realm functionality.
, the economies are good as a per realm basis in WOTLK classic and making it region completely messed up the AH in retail (both economy and AH addons).