I've just gotten back into this stuff this year (after being away for 30 years). Me and my dad had a hard time adjusting to all the field props, the use of electronics, all the 'interpretive dancing', the voiceovers and narration, some of the weird themes, and all the other stuff. It took me some time and mental adjustment, but I'm finally at peace with most of it. I figure that I've gone to rock concerts over the years where they use all kinds of electronics in their shows, so maybe I shouldn't get so bent out of shape when corps use it tastefully to enhance the show. But while I am okay with some of the stuff, some of it is undeniably a bit dumb and dorky.
My dad did make one little observation though. When I was in the corps, we used to march everywhere...as we entered/exited the field, and everywhere we went. We stayed in formation and held our composure. We never wandered around casually until we were out of sight of the public. Not a big deal, just an observation.
Beyond that, I am still bewildered how they judge and score these things (esp. with all these new weird factors involved).