One other reason to keep the bastard roles is, they can be used to balance some games. An OP role can be used to stop an overly strong enemy. They're also highly subjective. Notice princess isn't classified as bastard.

Probably don't need to include "weak doctor" as you explain what weak is in the submodifier.

Another variation of bulletproof is only blocking X-shots a night. Also, it sounds like you're describing a bulletproof vest, not the bulletproof submodifier.

Related, do you want to include items?