That study IS saying that levels of estradiol above 50 pg/ml are associated with increased libido, and in fact, that was the ONLY relationship between hormone levels and increased libido that survived multivariate analysis.
I don’t think @highpull would find it that surprising, given most of his guys are over 50 pg/ml at trough, let alone average or peak values: Testosterone Cream - Pros & Cons - #35 by highpull