“Doing better improv” is equated with “learning how to improvise better” as opposed to having a unique viewpoint or insight. Improvisers frequently say things like “that was good improv,” “that was a nice scene,” or “I liked that move.” There is less of “I thought the show was about y.” Does this differ from how you would talk about a movie you’ve watched? This is partially an artifact of how improv is taught. Many improvisers do not have a formal background in the arts. They encounter improv first as a hobby. Usually they are taught by improv schools with a hierarchy of levels and explicit idea of progression. Improv generally has to be taught in person, with personal feedback, from a more experienced improviser. This establishes a strong master/student hierarchy, even at performance level, with the implicit assumption that becoming “better” means becoming more like the master. Many improvisers also stick with the same school or teacher they started with. If they form teams often they use formats they have been taught by this school.
The sharp as hell Bill Arnett from Chicago Improv Studio goes into theatre differences and how improv splintered in the ways it did.