I've read the last couple pages and, applying my pretty marginal tech background, I can summarize:
The M-B tech team produced a basically faulty design (flawed in basics like high CG, wrong wheelbase); then that design was poorly implemented (amateurish fit and finish), and then ineffectively developed. Other than that, everything is just fine.
Seriously, the suits in M-B's mahogany row must be feeling very uncomfortable. Success in F1 can polish a brand image, but M-B's performance in F1 could (conceivably) have the opposite impact. They are in a tough spot: cut their losses and admit defeat? pour more money into F1 and hope that things get better? A tough-minded businessman would ask Brawn, what specific changes will you make to ensure success? I see no evidence that Brawn could come up with a succinct, believable answer.