I was annoyed with the LV panels too but eventually you just have so much space it doesn't matter. It only sucks early on, so stick to keyblade and save magic using for later in the game when you need it. Though on Proud Mode you'll probably have to stock heavily on Cure casts
Heh, upto Day 70 something now, and even though I'm getting a nice 'mount of panels from doing missions, I'm ending up with 1 or two bits of space left after adding the skills I want. Having LV4 cure helps immensely, espec for bosses, as it seems if I get hit with a cruel as hell combo, I can be 1-Hitted from full HP... which hurts

Other than that, I'm getting slightly annoyed at not being ranked-up again yet, such a pain in the ass that there is NOTHIGN I want to buy in the shop atm...