As I've stated before, I believe the 3x XP will eventually become the norm, not just RAF. (or perhaps 2x only, but whatever).

Once wrath comes out I think they'll make it universal as few people will be willing to do the full 1-80 as things stand.

I understand your position though, but it is your choice, the end point is the same, a team of 2,3 4 5 or whatever chars to box. Some people who are levelling 4 or 5 different teams I wager will become overwhelmed by it all when Wrath comes out, unable to decide which team to concentrate on. Sometimes having slightly fewer chars can be an advantage.