So would Living Dead's healing drawback still be relevant for someone with Superb Craftsmanship or a base Thaumaturgy complexity of 8?
Or could they just patch themselves up whenever they felt inclined?
I'd probably have spend a scene, in which they can't do anything else, per consequence to heal. That's in addition to how long it takes to heal anyways.
So, Mild consequence: Spend a scene patching up and your're good to go.
Moderate: wait a Session... gathering supplies or however you want to justify the normal healing period. Then spend a scene to patch yourself up.
and so on.
Plus, I'd probably only let them patch up Mild consequences on their own. Moderates and Severes would require someone else to do it, or at the very least to assist in doing it.
But honestly, i'd be very wary about a PC wanting to play a Living Dead if it was my Game. So it wouldn't come up that much.
And NSC generally recover off screen, so it's not really important how they do it.