I don't think the problem with Mariah's ABBA program was that Shae went too bold and avantgarde, quite the contrary actually. I thought it was a bland, lazy program (especially considering such music as ABBA!) and then Mariah didn't sell it at all on top of it. Not sure what the problem was, maybe she didn't connect to the music or the kind of dance style, that would've been fitting for this type of music (I did not really buy her Britney performance either, but at least you could tell that she was really into it and making an effort).
Kind of like Nathan didn't seem to 'click' with his Desperados SP, although personally I loved all of his outings in the first half of the past season. And Shae did make sure to not give him choreo that was too 'latin-esque' and the music was fun and energetic as well, so not sure why he didn't enjoy it.
ETA: And no, "fun and energetic" is not code for masculine.

Personally I don't think it's really possible to tell how well (or not) Nathan and Shae work together throughout the creative process, since we know so little about it. All I know is that over the past seasons she gave him some excellent moves and choreo which fit and enhanced his skating and movement style perfectly. So it would seem she knows how to utilise his strengths, and this is why so far I've enjoyed all of her work for him (would be interesting to know though, how much of it was actually his own adaptation).
Hopefully he would receive some good feedback from champs camp. I am not sure if he would be invited to Japan Open this year, which I do hope so
I wonder how his FS will be received by USFS and his fellow skaters.

Although at this point that kind of a program has become his brand and the formula is also totally predictable (I don't mind it, because it works really well and gives his programs a satisfying buildup, and who wouldn't want that for the Olympic season especially).
It would be best for him if JO happened the same way it did last year. Would save him the hassle of travelling this early in the season and we would still get to watch him skate.