One thing that always bothered my is how certain casters benefit from two stats (i.e. cleric mems faster with int, gains more slots with wis) while mages only benefit from int. Sure, it makes it easier to roll a mage since you don't need to care about the other stat but it just feels a bit inconsistent.
What if the spell slot progression was tweaked a bit and wis gave bonus slots to ALL casters, mages & shamans included. As a nice side bonus, the useless stat charisma could be deleted from the game forever.
Talking about mages and spells, it would be cool if mages can book-scribe a spell from scroll.
The scribed spell will last 1day in the spell book before it's gone. Mages can mem the spells while it's in the book.
This allows more play for scrolls in general.
More scribe spells you have in your book, the less chance you can scribe new ones in. And have a cool down for book_scribe at 24ticks.
The mage can book-scribe scrolls for other classes.
Book-scribe blue.scroll mumu
You carefully inscribe the magical runes from a blue scroll to Mumu's spell book.
Mumu gains the spell "power word kill".
A blue scroll disintegrates.
With this in place, all book loads will have chance of loading the scroll versions of the spell. 50X the load rate, whatever it is now.