I think Sasha has a clear advantage under CoP after comparing her performances at worlds with Michelle’s.
First, in the QR, both had some mistakes on the jumps (Michelle doubled and two footed, Sasha fell on the 3loop and only got credit for a double). Sasha landed 6 triples, 2 combinations and one 3-3 sequence, and Michelle landed 4 triples and one combination. Sasha won by 14 points, but her lead was only about 3.5 points after the factoring.
Next in the SP, Michelle had a classic Michelle performance with great emotion. Her only mistake was a shaky edge at the end of her spiral sequence, and she still got a level 3 and +1 and +2 GOE on that element. Sasha had a two footed 3f and a time deduction. Under 6.0, I feel certain that Kwan would have won the SP, but Sasha narrowly won by .15.
Then in the LP, both had jump problems again (Michelle fell on the 3s and two footed the second 3z and Sasha fell out of 2 landings and had a shaky edge on another.) Michelle had 3 combinations and Sasha had 2 plus a 3-3 sequence. Sasha won by over 10 points.
Sasha distanced herself from Michelle in the spins. Michelle is not a bad spinner, but her spins are still 6.0 spins that are nice and add variety to the program, but lack changes of position and edge. Sasha maximized the points in the spins with many changes of edge and position. Most notably in the SP layback, Michelle did no changes of position and Sasha did 3.
I think worlds is a good indicator of how both athletes will score in the future under CoP because they were both reasonably healthy, and both made some mistakes. I think at nationals, Michelle will still be playing catch up to Sasha, and she will need Sasha to make several mistakes to overcome the objective side of CoP. Sasha’s disadvantage is that Michelle is great at home as some people have said, and Sasha tends to be freaked out at nationals. However, even if she makes some stumbles, I think she will still come out ahead, unless Michelle works extremely hard on her spins over the summer and comes up with a program that allows her to keep the CoP elements she added this (year like the 3f2t2l) while doing outstanding choreography like she did with Lori.
CoP favors a skater like Sasha, who always has some jump errors, but compensates with great quality throughout the non-jump elements, over a skater like Michelle who is in the 6.0 mindset of skating clean with the total package at the expense of other elements, in her case the spins. Both skaters have great footwork and spirals that received level 2 and 3 and +1 and +2 GOE. Michelle has stronger individual jumps, but Sasha was able to do more jumps in the LP to add up more points.
Of course, there are several months to go before nationals, and the outcome could be affected by injury or Olympic year strange occurrences, but from what I have seen, I give the edge to Sasha to win gold at nationals after many silvers.