I don't see anything wrong with this really. It will help the more casual players advance at a more encouraging pace, while the hardcore or regular daily players will continue to level normally, as they have so far.

Right now, you can be power-leveled to 30 in a couple of days, raptor party (or whatever) to 40 in a few more days, and 40 to 50 in a single day in stronghold. Provided you have friends/LS mates that want to help you. If you're new and/or don't have a static (plus there's a matter of many current players having a lot of their classes 50 already), or just want to play on you own for a while, it's bloody boring. I'm willing to argue that soloing DoW/DoM is far from fun/enjoyable/easy still (battlecraft leves/behest/GC leves - all the same tedious thing with a different name and the "quests" will only get you so far). Nothing spells 'demotivation' better than repetitiveness accompanied with slow progress (guardian aspect or not).

And since I already mentioned guardian aspect, how come no one QQing about having that, it's the bonus/free exp you get over time after all. Somehow, grinding to level 50 in under 10 days sounds more legit and hardcore. Virtual peeing contests at its best? /shrug