So for comparison, in the "Stop Moving So Much" school of magic, we have:
Spell --- Level --- #limbs --- Removed by
Bind --- 3rd ---2 ---Release (5), Purify, Dispel, or breaking LOS
Wither --- 6th --- 4 --- Restore (6), Purify, Dispel
Confine --- 7th --- 4 --- Release (5), Purify, Dispel, or breaking LOS
Stun --- 8th* --- 1 --- Dispel exclusively
Hmm... I see the argument for having a spell that requires an 8th level to remove. And shifting it down would leave 8th level with just Evocation Bolt, Dispel and Reflect. Buuuuut I'm not sure I can say that I would ever prep Stun over Dispel at 8th unless I had way more columns than I knew what to do with (if I ever roll a Celestial scholar, that is).
Maybe it'll turn out to be super sweet, though. That's what the play tests are for.
*Edit: or 3 build per 45 build in fighter/rogue.