For spontaneous casters, it would be very handy to have a check off box of per level spells, probably on the front page or on the spell page, so that casters could easily tick off how many they have caster per level and have left.
Level 0: Free
Level 1: ❏❏❏❏❏ ❏❏❏❏
Level 2: ❏❏❏
There is no "room" to speak of on the first page.
I'm trying to envision where exactly this is requested to go.