I think the number of guest artists is the key, as well as the stature of the artists. You bring in guests to sell tickets, and it's hard for me to believe that most of the guests ABT has for the Met season is serving that purpose.
You also bring them in to represent a certain artistic standard or quality and to share that with the audience and the company. Ideally, as in ABT at its best, the company itself is at a comparable artistic level, but that doesn't mean it and its audience can't benefit from a great dancer's guest appearances. And, of course the company is not always at the same level.
It's the excess of the guest appearances, the drop-in, drop-out policy of many of them, that seems the problem, especially when seemingly very talented men at ABT are not being given what seem like obvious opportunities. (If they really are not up to those opportunities, then the company needs to figure out why; if they are...it needs to have more faith in them.)
(While some of those invited this season are unknown to me, I wouldn't want to comment on quality without seeing them. Maybe they will be something special. Maybe not. I wonder, though, if ballerinas like Murphy had an influence on the import of some of the unexpected male guest artists...if they have expressed concern about having experienced partners.)