That's what I'm saying. Magical Beast is a better category than Monstrosity.
And Outsider/Immortal is better then the Celestial & Fiend categories.
Modrons aren't actual Constructs, no one builds them, they are Planar Exemplars same as Guardinals, Devils, etc...
Slaads are Planar Exemplars for Limbo. They have no connection to the Far Realms.
And Empyreans wouldn't need two creature types, and still not really cover all it's bases (Empyreans of TN, CN, LN Gods what are they?)
Should have brought back Outsider from 3e and Shadow from 4e, way more consistent creature type philosophy. Creatures native to the Outer planes Outersiders, creatures native to the Elemental Planes Elementals, creatures native to the Feywild Fey, creatures native to the Shadowfell Shadow, creatures native to the Far Realms Aberrations.
Everything else describes different kinds of Material Plane creatures, Magical Beast, Beasts, Plants, Humaniods, Constructs, Monstrosities, Giants, Dragons.