Thanks Noel. You are always so perceptive. This one's more intuition than intellect.
Can only repeat my attempted explanation to Floyd.

"Well it's feelings rather than a story. A bit abstract.
The verse and prechorus (if that's what it is) contemplate different aspects of a relationship.
With some joy and some misgivings.
The chorus reaffirms the purity and strength of the relationship. I sort of felt it being an interlude in a rock opera. The male lead singing the verse and prechorus and massive chorus and orchestra thundering the chorus. Crystal Heart is the female lead. That's about it."

Tried a few swing styles and couldn't find a fit at all.
The vocal accents are mostly on the weak beats 2 and 4 of the bar in the chorus (which still feels stable)
and in between beats most other places (unstable). Thanks for your thoughts. Very interesting.

But I dunno - it's all pretty much what I wanted. Cheers.

https://soundcloud.com/tuigorge