Originally Posted by
Endus
Forced name/guild name changes, people having to delete toons if they have enough on both servers in question to put them over the cap (let alone having a DK on each), etc.
Server merges aren't the simple solution some people think. Especially since it doesn't address old world zones; it just means there's a higher overall population, but the older zones are still unpopulated relative to Pandaria, since most players are focusing on the new content. That's why they went with CRZ; they can adjust it to ensure that those zones are actively populated, even if the population shifts, which server merges don't protect against, and on a zone-by-zone basis.