Your proposal intrigues me, not to be too critical but I have a few questions.
How does introducing more people solve the problem? I know you may think that more brain power will result in more clear rules but this rarely is the case. In fact, introducing more people will cause rules to become more unclear because you will have several different voices instead of one unified voice.
What makes the head coaches of the Champion teams qualified to do this? I know that on RUSH (I use it as an example due to my experience with them) the head coach, Mrs Kyle Hughes, is a wonderful leader and strategist but can't even drill a hole properly (no offense Mrs Hughes, Im just making a point) And on some teams the head person is brilliant mechanically but doesn't understand strategy to save their life. You need people who can do both, or at least a committee containing both types of people. Really the problem here comes down to, who do you pick to be on this committee?
No matter how many people you have go over the rules do you honestly think that 1700 teams with some of the brightest engineers and students in the world can't find flaws?
More committees sounds like how the US makes laws, I dont want to get a rule manual that is as long as some of the bills that go through Congress. Also, if I ever hear a rule read something like the following I will cry.
"The robot put on the field and operated by the team which will hitherto be referred to as "The Robot" shall not weigh more than 120 lbs excepting regulation bumpers (see Rule 174.3 A) and a regulation batter (see Rule 258.96 R) and shall not exceed the starting dimensions 28" x 38" x 60". The Robot may extend outside of these starting dimensions provided it follows the rules in Appendix E(Extending Mechanisms)"
In all honesty though, more committees involved the more the rules could start sounding like lawyer-eese.
Now, keep in mind, those are just concerns that come to mind, Im not saying they cant be addressed or that your solution won't work. In fact, I applaud you for having the courage to come forward and propose a solution instead of sitting back and complaining impotently.