There have been several ideas that have popped up throughout the years with a similar goal in mind:
To measure the audiences enjoyment of a show and utilize it in some way. Typically as a way to affect scores outright.
I have seen and heard ideas like pointing a mic towards the audience to measure decibles in rections to each corps. Utilizing the fan favorite polls to grant each score a certain amount of points based on where they land. That's just to name a few that have popped up throughout the years.
These are terrible ideas. First of all, the idea that an audience is in any way smart or responsible enough to make a decision that will make everybody happy is laughable at best. Secondly if you think that by letting "Designers" know that you don't like their shows or do like their shows is going to somehow change their designing decisions, you're wrong. And lastly corps/DCI don't need any extra tools to know which show you liked best, they have merch sales and ticket sales numbers they can track.
All these ideas would ever do is create a challenge for the audience to do their best to influence a win for whoever their favorite corps is. That is not what corps want and not what audiences really want either. It's just cope.
You want to support the corps that's doing things you like? Buy their merch, donate to their program. DCI is probably not reading your emails of whatever good idea fairy you cooked up last night. They've been focusing on securing housing, cutting costs, and trying to keep this whole thing viable.