The direct hindrance is the extreme imbalance created between the characters and the DM's world if one PC does this and the DM lets it happen for some ridiculous reason. The intent, and impression given by a normal reading of the power, is that you're undoing choices made on a level-by-level basis going back from your current level as far as you want to go. Then, you make your feat and skill choices again on a level-by-level basis.

If this is just a thought exercise, then I suppose if you squint your eyes and tilt your head just right you can make this kind of leap in logic. If it's for actual play make sure you wear your dice-proof helmet and prepare for the DM to laugh when this gets suggested, and laugh even harder when they realize it's a serious request.