Good points, Doris. In regard to point #3, I'm wondering if the throw 2Axel appears in the program because their planned content is throw 3Axel, but they then make a mid-program decision to do throw 2Axel instead? If this is the case, it's probably not the best strategy anyway. Either commit to throw 3Axel or switch to a different throw. Maybe they've been practicing throw 3Axel for so long that their other throws are a bit rusty . . .
Regarding points #1 and #2, keep in mind that Bobby Martin, Marissa & Simon's coach, is new to this level of coaching. He's not had any elite pairs prior to C&S and D&S (that I'm aware of, anyhow). So he may still be learning the finer points of strategy and technique polishing at the world level. Overall, their whole team, C&S included, is relatively inexperienced, with the exception of the choreographer. I would imagine another year or so on the elite level will help them all improve and sharpen strategy, especially if Marissa & Simon make Worlds this year.
What's happening is not only the emergence of a strong new pair, but also, potentially, the development of a new elite pairs coaching team in the U.S. We need more strong pairs coaches in this country, so I wish them success.