WoLK seems to me like one big anti-boxing mess.
I've reached 74 and decided to have a go at some more quest and it's like an XP wall if your a multiboxer.
They have quests that only one person at a time can do them. there is one in coldara, the "rifle the bodies" quest in dragonblight has it so only have one body that can give the item and it has a slow respawn rate of like 2 minutes or more.
They have some quests where only one person can mount at a time, can't follow someone at particular times, the loss of focus when you dismount a quest mount/vehicle.
The zones where if your all not on the same quest you can't see each other.

The problem I have of staying in the dungeons is that they are the same dungeons I'm going to have to run through to get my reputation up at 80 and if I run them 20x times now I'll be sick of them by 80.
I think it was artfully done in that a solo player probably won't ever notice these changes and xp rates for the solo player are just fine.
But for a game that supposedly supports multiboxing it's getting very anti-boxing.