Well, it does seem the Holy Father has his favorite hobby horses, caricatures, and a few straw man constructs he likes to pummel with insults as well, such as the well-known "Promethean Neo-Pelagians."
But HERE it looks like Fr. Z is suggesting that the Pope is using "doctors of the law" to refer to those who are legalistically preventing the gay or divorced and remarried from receiving the sacraments.
One might think on first blush that this refers to some wacked out raddie traddie foam-at-the-mouth traditionalists. Not so. At the very least, it's a straw man. At worst, it's a charge that finds traction only in the established teaching of earlier popes, like Pope Benedict XVI in his Post-Synodal Exortation Sacramentum caritatis, where he is very clear about guidelines for licit and valid reception of the Sacraments. Have a look for yourself. Interesting.
Fr. Z bends over backwards to be a loyal and obedient son of the Church here, which is to say, diplomatic. Good for him. Read a Fr. Z's well-rounded discussion HERE.