Spellcaster Bloodlines - does it not work with CAS made sims?

When I started a new game, I removed the bloodline trait from my active sim. She still has her ghost family around but not that trait.

That trait let me rank up the caster levels and learned every spell and potion in just a few short hours. It was too powerful. I could see it being useful for a sim many generations down the line when doing all that stuff is no longer interesting. But for a sim you want to actively play it kinda kills the fun.