Well you're never really "too high leveled" for any place. The only thing is that it will be much easier (and maybe kinda boring) for you in the beginning and that you'll level up much more slowly until you get to an appropriate level for your quests.
I did this as well. On the girl I made for PVP, i power leveled so I could get on a higher level easy. If, you actually want to quest and level up, you can do it, its just harder. The bosses and dungeons are so much easier, so thats good. But, it will take you so much longer to level up. Also, from when you were power leveled, the dungeons you went in wont give you as much experience. - Scarlet Rose- level 75 -Paige Nightshade- level 25
I know what you mean... I'm trying to defeat tons of crabs in Crab Alley so I can get three Celestia badges before I go there. It feels like a waste of mana. All being a higher level does is remove the fun out of lower level maps where all you have to do is cast 1-2 spells and it's dead and it takes at least 6 mana.