Moreover, your distinction between Innate Talents, Ride-Along Talents, and Thematic Talents seems somewhat inconsistent:
p9: Renaming "Thematic Talent" to "Activatable Talent" would better distinguish it from Ride-Along Talent and Thematic Talent by clarifying its function—signaling that the monster can choose to use it as part of its action or in response to an enemy’s action. The current term, "Thematic," is quite broad, and its definition ("These talents often contribute to making a monster what it is") could just as easily apply to Innate Talents and Ride-Along Talents. This ambiguity is further highlighted by the fact that one of the three provided examples of Thematic Talents—troll’s Regenerate—is already found on p12 under Innate Talents, rather than under Thematic Talents—and medusa’s Petrify ought to be found under Innate Talents as well.
p11: Crown of Gehemna is "3/day", so be definition it's not "always on" but a magic item that must be activated. Consequently, it ought to be categorized as a Thematic Talent (since it's similar to Dodge), rather than an Innate Talent.
p14: Blind (HAG, NIGHT) and Constrict (SNAKE, GIANT) are Thematic Talents, since they do not depend on an attack hitting—which is what characterizes most of the actual Ride-Along Talents—but are activatable on their own.
p14: Carrion Mist (DEMON, VROCK) seems more like an Innate Talent (since it's trigger is very similar to that of Corrosive, Melt, and Reflective Carapace).
p16: Tongue (FROG, GIANT) is a Thematic Talent (since it's similar to Pull).
p17: Bewilder (CAVE BRUTE) is an Innate Talent (since it's similar to Gibbering and Heat Aura).
p18: Contract (DEVIL, IMP) is an Innate Talent (since it's similar to Alert, Feyblood, Stealthy, and Stumpy).
p19: Petrify (MEDUSA) is an Innate Talent (since it's similar to Gibbering and Heat Aura).