Merlin says:
Unless I am missing something I would like to see slots to track hit points and spells.
Spell slots and "Prepared" spells would be great. It would also be great if you could put the level of a spell somewhere and have your list sorted by that. I always hate digging around to remember what spell goes to what level, and what slots I have available. Then on top of that playing a wizard is a whole new game of trying to remember what spells are considered Prepared versus the ones that I know.
Hit dice tracking would also be great. I know you generally have one for every level of a class, but remembering how many has been spent all have to go in notes as well.
It might also be nice, since you have the background listed up in the top area, to have a box for your background where you can put your Bond and Ideal and all that so it's separated out from the notes block.
It's quite a bit of separation but it might make information reference more streamlined.