Yea the difference between rested exp and guardian's aspect, is that you were able to choose whether or not you wanted to activate guardian's aspect. With rested exp, you don't have a choice anymore. I think this needs to be fixed, as you might not always be necessarily playing on the class you want exp on. Crafting/gathering vs. battle class, is a good example of this. Maybe I just want to gather some ores so I can sell them but I really don't care about leveling up my miner, I'd rather save my rested exp for my battle classes. Would be nice if we can choose when we want to use the exp and when we don't.