What are you referring to in particular?
I am okay with considering things like "Vulcanian" and referring to the Enterprise as "Earth Vessel" being early installment weirdness (basically, all the weird shit that happened in the first half of Season 1, when they had no idea what they were doing). But not TOS as a whole.
That's why I said "some", not TOS as a whole.
But yeah those examples are what I'm thinking of. Same with stuff like cloaking tech being a relatively new concept in "Balance of Terror", when ENTERPRISE later featured multiple species with said tech only supposedly "less advanced".