>>96732578
Having pondered this for a while, a few ideas on it:
1. cut down and condense most spells into a few major categories where they thematically and mechanically fit.
2. What you can do with these spells depends on what level slots you attach them to and how many slots in that level you take up.
3. Present the option to use slots without spells attached to them in some way, shape, or form.
4. In regard to all magic, regardless of power source, make each "school" favor certain stats instead of PCs being locked into using certain stats by their class (i.e. wizards are not not just int-based, bards cha-based, etc)