Cross-Realm Zone Contest Changes
"CRZ isn't intended to affect fishing tournaments. We'll get that fixed if the patch today didn't fix it."
This was Ghostcrawler's response to Yatalock's question about Cross-Realm Zones making Contests harder to win. The question was not solely about realms setup over different timezones, which have allowed various winning exploits. So the answer implies a return to one-winner-per-realm.