Its a shame that other classes can equip spellslot equipment and use the slot and then unequip the item and these classes can not. If possible - can these classes use spellslot equipment and if they have cast a spell of that level and remove it they retain their spells casts, rather then loosing one?
It's extra painful with a shapeshifting sorc. Losing your spell slots each change.
I mean if it was possible I'd just go the other way and make sure nobody could use up the spell slots on their gear then remove it.
Not really something we can control.