Yes, the "Beta" will be a fully edited, dev-reviewed, laid-out file for review.
I anticipate the next question will be "so how much can our input actually change, if it's that far along." The simple answer is, we won't know until we see what your input is. Any other answer, I'd just be speculating.
Speaking only for myself, but as the editor of the book: I think it will depend in part on how thoughtful and detail-oriented the edits and feedback are. If someone says, "these rules suck, trash them and give me MW 2nd Edition"...yeah, we're not going to do that. But feedback provided in good faith will be considered, at the very least.
Phil, Dak, and our whole team worked fast but hard to make MW:D a polished product. Phil, especially, spent a lot of time on it, and has thought through every element of the system - nothing was done haphazardly. So I'm expecting that most feedback or edits will be specific and actionable.