Kids like what they know. (I'm a retired educator.) It's subjective.
Are "Jersey Shore" and "Deadliest Catch" better than "Law & Order" and "NYPD Blue?" (Answer: The apples you know best vs. the oranges that you know best.)
* The "story" was different in the days of Ol' Skool. There was a progression to a drum corps show: OTL, drum break, Presentation, drum break, Into-Concert, Concert, Out-of-Concert, drum break, Off the Field, Final Fanfare. The best corps played-up the General Effect expectation of all parts. Get the audience (aka: "popcorn-eaters") out of their seats clapping and yelling -- make 'em emotional, make 'em smile, make 'em reflective, set up up for the finale, tug their heart-strings, leaving cheering and raving about the performance . Some corps did it better than others. Drum corps affectionado's grew to understand this progression, and could detect execution changes (good or bad) in performance of any phase of the progression from season to season, or even individual shows to later performances.
* Also, old timers often made a deliberate decision to march (not "perform") in drum corps as an alternative to high school and college marching bands, usually held in lower esteem for lower marching skills, easier drill and music, less challenging color guard expectations, less commitment to seeking perfection execution of the program. When top-end drum corps began to look & sound more like marching bands (even good ones) it created a sense of incongruence.
* There was a significant rift in the world of Class-A (World Class) units with the advent of try-outs for "corp-ies" (those who jumped from one corps to another), rather than making a loyalty commitment to your local corps, thru good times in and bad. While younger people think jumping from corps-to-corps "is what it is," old timers often continue to look less-than-warmly upon "corps jumpers."
Just my two cents.