The expected behavior for equippables with CoB seems to be that they can be taken off in creative mode, but not in survival mode and to drop normally on death. This is not the case for baubles, baubles can be taken off anytime when CoB is applied to them. I'm not sure what the best way to implement this behavior would be, since implementors of the API are perfectly capable of implementing CoB behavior on their own baubles, but I reckon an implementation in Baubles itself would be cleaner.

Baubles seem to ignore every single enchantment in my experience.

Baubles should normally not be enchantable and no enchantments applied to them would have any effect unless specifically coded for.