IMHO the reason the neighbor's scene felt so ntrish is because both claire or zoey are getting the fuck of their lifetime, while mc has a pretty vanilla (and almost submissive) sex scene with the neighbor's wife. I don't think a change to the zoey or claire + neighbor scene is needed; just imagine, it would have felt totally swingerish if zoey/claire are getting their brains banged out while simultaneously the neighbor's wife is screaming like a banshee downstairs while MC takes her through a grand tour of sex positions.
As for the earlier stuff and the way the first swinger night went...I have trouble critiquing that without critiquing the bbc fetish itself which wouldn't really be fair....maybe a fan of bbc stuff could chime in and explain how the bbc fetish can exist happily alongside swinging vibes - because to me they're mutually exclusive - bbc fetish relies heavily on themes of one-upsmanship, and the girl "having an experience like she's never had before", ideas that are very aligned with cuckoldry and not so much swinging. But I'm open to being wrong if someone could explain.
Please bros take that stuff
here not here.