Just a though.
Will MOP cause more bans?
Cross-realm zones = more players in the zones. This is likely to cause more reports of botters.
More competition and more obvious who bots on public profiles?
Since it will be cross-realm zones it probably means more competition and more botters running the same profiles, so then it might become huge bot trains.
It will also be more players in low lvl zones so the bots that lvl will be near other players. (now you rarely see anyone else)
It isnt that obvious that a low lvl char bots though, so might be no problem.