There are rules that we are using internally to create monsters, but they are much more like those in Starfinder than the ones in Pathfinder 1st edition. All and all, I have found using them make my life as a GM immensely simpler, especially when working on the fly in the middle of an adventure.
Of course, as always, this system is also open to review and your feedback.
I would love to get my hands on these rules!!!! (Edit: Right Now! During Playtest)