I'll see what I can do with the new spell system. Do you miss the old sprite as well? Pathwalker could get the new daemon sprite (I wanted to use Pathwalker's sprite for Horror mod anyway) and Bengehenom will get his old sprite back. The Wing Pass will get the correct feeblemind effect. #secondaryeffectalways is still bugged so I made feeblemind a secondary effect only. I'll also add two more misc slots.
New spells can be done, but not researchable national spells. And there've been reports that state that national spells are currently totally impossible.