I think most critics have their set likes and dislikes, and one of Macauley's known dislikes is overtly "sexy" pas de deux between a man and a woman that doesn't fit his aesthetic. I think that's what he meant by "heterosexual partnering."
He goes more into it later on:
Are these characters dead, as the title “Acheron” implies? They’re still creatures of sexual and sensual behavior. In one motif, Mr. Danchig-Waring, standing behind Ms. Mearns, runs his hands down her shoulders and upper arms; Mr. Angle, also from behind, plants an emphatic kiss on Ms. Krohn’s neck; and in one incident all three couples seem to nuzzle each other, heads and necks interlocking fondly.
Odder is the way the female dancers, lifted or supported, keep opening their groins at the audience. Near the end, for example, a number of women, lifted from behind and facing the audience, have their knees tensely bent and held together; then, suddenly, they part their thighs for our benefit. This is one of several images of behavior that are never resolved in terms of poetic meaning.
It's this kind of choreography that he dislikes and he's pretty consistent about the reasons why he dislikes it. I don't think he's being unreasonable in the sense that ballet is an art form dominated by personal aesthetic. If he doesn't like seeing something onstage, he's entitled to explain why he doesn't like it.
Think this is one of his best reviews. He doesn't make snide snippy comments about dancers and instead focuses pretty specifically about the ballet.