Great minds .... I was just about to take this discussion here and ask to the most knowledgeable among us (
@Anyasnake maybe

) just how tough the CoC tech team composed of Slavka Grincova and Elek are ? They indeed seemed ruthless with B/S and C/B so it would bode very well for P/C.
So nice you thought of me
@cocotaffy 
I'll do my best ! There are still MANY things I don't know about how you make the difference about levels, however, mistakes cannot be left off. So for the SD :
C/B :
Pst level 3 : no visible mistake and well skated so that seems okay. Compare to P/C's level 4 : watch both Pst, there is quite the difference in execution of turns and P/C's a lot cleaner.
Rumba level 3, first keypoint with a N ("No") = one of the two didn't have a good enough chocktaw (I'd say by the look of it, Maddie could have had a better edge on the first one, but it's a bit picky for me).
No-touch level 2 : it seemed a bit flat on edges (good with music) so maybe not enough clean turns and probably a composition issue (didn't follow enough rules for maximum level, often a reason for a top team with level 2 without mistake)
PCS were quite nice though.
B/S :
No-touch level 2 : better turns and sharpness than C/B by the look of it, I find the level 2 harsh but they are stuff they see that I can't... check the TES box it was level 4 at first.

Rumba level 3 : same No. Katia's chocktaw wasn't pretty at all it's obvious if you watch it.
Pst3 : definitely not 4 because Katia's last twizzle was messier, picky panel might take that as a mistake.
Again, nice PCS.
Again for P/C No-touch level 3 : the line between 3 and 4 for me is very unclear so I don't know. It was pretty clean and if you want to reach level 4 pickyness

you can say that Gaby's first twizzle could have been better (but being picky is fair : it is Ice Dance).
Rumba : very good (quite impress with their pattern actually), and the Pst for me (and I can say with confidence that I am not biased towards them for that) is probably one of the best if not the best on an edge quality and technical point of view. But they often show they are at ease with step sequences, but this is one of the cleanest I've seen them do.
(I actually like the fact that there is a 1.50 point room for improvement. Don't peak too soon.)
In the FD, levels weren't that tough (or not tough AT ALL, and so were PCS), it was quite well awarded for top 3. The GOEs made a big difference. However, I thought I would reverse levels at P/C's Cist3 which was much better executed than Dist4, but instead it got reflected on GOEs (only 2s not 3s for the Dist). But it might again be composition.
Another factor at why panel won't maybe give a full level 4 on the FDs yet : might want to wait for GPF or Olys for that massive score. Since the placement are pretty fair, that's okay with me (I actually prefer that : if you get everything level 4 now, you don't have that much room left for big points gap). For CoC, P/C have left 3 points just on levels for the whole competition, even with that score, so good sign on skating quality.
Conclusion : though Panel for SD (I guess being a top team you can't afford mistakes, especially on a pattern or you'll get hammered), but not so much on FDs, however FDs were much better executed.
Very sorry for the LONG post on a fan thread, I'll stop !