The squeeky wheel gets the grease, I suppose.
I agree with Voqar that is does seem silly to be providing feedback when, like Brad has said, almost everything will change by release. But if you have a proposal or suggestion I'm sure the devs wouldn't mind you posting it. They're trying to make the best game they can, and if there's something about it that you don't like aesthetically or functionally, then why not speak up and say something about it? They probably won't change anything based on any one thing a person says, but if enough people like an idea whose to say it won't push them in the 'right' direction, towards a product that is ultimately more enjoyable for you and everyone else?
That's my thought on the matter, anyways.