I would like to see the posibility to spend the Slots for passives. e.g. you could choose Virus for the whm and use a second Slot to get the passive to make it par with the arcanists. Another example would be to choos vita for the Paladin and spending a second slot to make it scale with strength instead of willpower. Or spending a second Slot for stoneskin to transmorph the character into a lalafel till it wores off.