I wish we could get past the criticism of Zabijako/Enbert including throw double Axel. First of all, its base value is only about 1/2 point less than the standard throw triple Salchow. And if they are confident with it and landing it well, they may well get strong GOE and wind up scoring more on it than other pairs do with a so-so throw throw triple Salchow. (It's about what you can reliably deliver well.) Second of all, let's not forget Savchenko/Massot won Europeans and put up the third-highest FS score of the season with a throw double Axel--so it doesn't necessarily doom you.

Third, Z/E's throw double Axel is in the program for the same reason that S/M's sometimes is---Because their original planned intent was to do throw triple Axel, BUT they just didn't want to risk it this season, after Natalia's head injury last year. If Z/E decide to give up on the throw 3A, most likely they will then replace the throw 2A with another throw triple. But I don't see the fact that they have it in there as some kind of definitive evidence of completely subpar technical ability--far from it.
I agree that side-by-side triple Salchow is not a strong element for Z/E, but again, many top senior pairs actually do not have 2 reliable side-by-side triples: Sui/Han, Yu/Zhang, Peng/Jin, Ilyushechkina/Moscovitch, Knierims. Yet that did not stop any of these teams from scoring top 10 at Worlds, or high elsewhere (Peng/Jin). And it's because they make up for the side-by-side issues in other areas of their skating (twist, lifts, spin elements, etc.)
Going into Worlds, Zabijako/Enbert were #10 in average TES score in Grand Prix/major ISU competitions, and were actually #11 in average base value score, so really they're a pretty strong team technically, or at least they were this season. Their relatively poor free skate at Worlds was somewhat of an anomaly.