well, returning to the subject in a serious way, the future of lord isn't great with or without crossrealm.
The realm itself is pretty strange, because warmane isn't a x1-no shop related team, warmane is know for stability, pop and shop.
Even before the cross realm icecrown was warmane main product, when you mentioned lordaeron a lot of people were like "isn't warmane high rate and p2w?".
There is a small posibility that was unintended, just maybe they think merging a x1 and a fun server will be a good idea,lacking common sense in the process, but this is just for give them the benefit of doubt. In the other hand cross realm feature show you the lack of interest on lordaeron from warmane, they don't gonna bring anythyng appealing to x1-no shop population, lordaeron has lose its purpose.
My point is that even if they reverse the cross realm the realm itself will be vulnerable to future changes because warmane isn't suited for x1-no shop mentality, so expect 0 people in lordaeron for pvp outside of stager or unwary players.