Yeah he and Mizora need some serious development attention, their state is not acceptable a year post-release.
All development attention seems to have gone into him remaining bound to Mizora, as rejecting the pact breaks his storyline's consistency apart (and also Mizora as a summonable ally, was quite sad about that). I'll probably take him with me the next playthrough to test his other path, but let me know in case there are any more issues.
