The following quote is what is pushed me to the same conclusion:
From the standpoint of a horn line fan and former horn line member regarding the Madison 20 man tuba line, the synth was merely a castration of good players put on public display for all to see.
Using the synth to double horn lines and create artificial dynamics was the last straw for me. I only attended finals last season due to being an alumni of one of the finalist corps. Unless the keyboard/synth is removed entirely from the field, the only show I will attend in the future will be my corps home show.
But, hey, I am only one voice that DCI is not interested in hearing from.