Parmandur
Book-Friend, he/him
Not to pick on you on particular, just riffing off of this particularly pithy statement of the issue.The organization doesn't really make sense (grouping some things and not others)
I do see the logic at play here: they have grouped together Monsters when they will either be in a group encounter (various Goblins) or you would want one that is CR appropriate for the party (different Tiers of Fungus), rather than world building groupings (Vrocks being under D for Demon).
I am fairly agnostic on the issue, but I do see the logic at play, and how it will work in prep.