While I agree that skating skills and flow out of jumps is more a TeamRaf thing, but if my memory is not fading me, I remember back in early 2018, Ic3rabbit mentioned that she had seen Nathan received edge training from Shae Lynn. This article from 2017 seemed to confirm what she had said.
I also remembered both Evan and Vincent, the latter I am not that sure, said in interviews that Lori would asked them to hold the landing positions little bit longer. So I do think choreographers have influences on how jumps are done to enhance the programs.
My impression is Shae-Lynn has much more influence on Nathan than we probably know. There is on going communications between them about possible music choices, recommendations, even costume choices which we never expect. To me, Nathan is in good hands with Raf and Shae-Lynn, so I wouldn’t worry too much if we are going to have two amazing programs