I'll be kind of disappointed if they don't have exp rewards. I remember when has come up in the past on the forums here, a big reason people wanted it was to give more variety in leveling alt classes so it wasn't just a grind fest. It does seem the perfect thing they could do to encourage people to have more than one class. It doesn't have to give the other rewards, but I think they're missing an opportunity if it doesn't help level alt classes.