I'm not saying that he can't use them, but the fact that he uses them again and again and again and doesn't seem to recognize that this is going to be troubling to his audience and often doesn't address them in-text makes me nervous.

I don't think we can evaluate Joss' feminist learnings on the basis of his works of fictions.

His learnings? No. How deeply he holds to those learnings? I don't see why not. You give away your worldview every time you write. Someone who has really internalized ideas of the importance of consent can write a story about a lack of consent, but those internalized ideas are going to come through--or, at the very least, the opposite of those ideas aren't.