Pro:
- more PvP activity on the isle
- new pvp content for bored Lordaeron/Icecrown players.
- thanks to cross-realm technology the normal version of queldanas can be run on the main realm while the custom version of queldanas is run on Blackrock realm. So both isles can coexist.
- ppl who don't like custom content won't get in touch with the isle since it's run on a different realm.