B/K had two new programs in the beginning of the season, they got a new FS at the end of last season, right before the p*ndemic happened. At Russian test skates, they reused the Bond FS because of the lockdowns and planned to replace it with the new one once the season begins but then they got YNW and opted to reuse the Bond FS throughout the season.
I also disagree that the SP was bad, it was very classic and obviously designed to show off their elegance and lines in a similar way to what the nutcracker FS did.
B/K issues were mostly mental, I think they were really thrown off by having to face direct competition in the rink every day, and once an error on the throw flip was made it became a mental block for them that stayed with them the entire season. The judges were always ready to reward them, at times more than their performance deserved (at least for me) so it wasn't an issue of material as it was an issue of consistency and that one is completely on them - they let the pressure get to them more than once this season and especially in the FS here at Worlds but that wasn't Moskvina's fault.
The bright side is that it's a lesson they had to learn the hard way and it's better to learn it here than in the Olympic season, the only remaining question is if they will use it as a learning tool and mature instead of staying in their current mindset.