I'd like to chime in hear and express my unhappiness at this.

I have been playing this game since very shortly after launch. You might notice that I have Gladiator at level 44. None of my classes are at 50. This is by choice; I want my leveling to be slow. I use Guardian's Aspect sometimes when I want to level faster for whatever reason, like perhaps a story quest is coming up next level, or because I simply feel like it that day. I'll skip over it completely on other days.

If it works like WoW, I will no longer be able to choose. Not only when I want to use faster leveling, but for what as well. I will have to choose to play what class I want to level faster first.

If they make it possible to choose when and to which class you use this rested xp, I would be fine with this change.