I totally agree with you on the part of the instructional and design staff comment. For the Bluecoats, I believe the steal of the century was aquiring Mike MacIntosh from the Cavaliers. He's what I would like to call the Brett Favre of Drum Corps drum lines. I believe it was John Madden who said (about Favre): "He can beat your guys with his guys and he can take your guys and beat his guys."
With Mac, also came some other big names in the business: Brett Kuhn, Scott Koter, Drew Shanefield. If you also add the instructional and design talent that has been developed in their tenure at the Bluecoats in people like Doug Thrower, Mitch Rodgers and Stephanie Furniss.
For lack of a better term, "politics" does exist in drum corps. For a judge, I would suppose that critique is somewhat akin to time in the dentist's chair or a trip to the proctologist. I believe it would be tough to tell the design staff of the "big three" that the Bluecoats have a better product to their face. That's why the most respected name with the most political coin you can get works to your advantage.
With those names also comes the talent. Percussion and color guard are the two captions that signify this the most. The corps for which they march is not as important as the instructor that they march for. Look at the drumlines at BK in the early nineties. They went there for Ralph Hardimon. Look at the colorguard mass exodus from SCV to PR last year and what happened to the colorguard program at Bluecoats in 99.
For the Bluecoats to win a championship, they need to keep the core design and instructional staff in place, add/tweak a few areas, and keep the Texas pipeline open. In the near future, I don't believe that the Bluecoats are going to dominate the activity (Cavs 02) so their best bet is to have the best balanced program to be in the top 3 in every caption to bring new Blood to the champioship level in DCI.