Okay, Long-ish post incoming.
I have a lot of different thoughts and feelings about this subject, and they have only expanded as I have progressed in my time as both a student and music educator.
In Texas, tone (and by proximity intonation) is king. This is a direct result of an advantage Texas has that I would imagine most people don't consider. The average beginner band experience in Texas involves a homogeneous (everyone is playing the same instrument) class every day of the school week, and this is not something that can be said for a lot of the continental United States. There are lots of places that have homogeneous classes that only meet every other day, or they see their students everyday but it is some form of a combined class (all woodwinds, all brass, or everyone all at once). In situations like this, it is virtually impossible to devote a large amount of time to developing a characteristic and mature tone. Playing more notes so the class can learn more music together becomes the main goal.
BOA, as it's name sake would suggest, is trying its best to put forth a rubric that can fairly judge students who have had wildly different musical journeys from all across America fairly. For the most part I think they have done an excellent job, though I do think the GE panels need to be doubled as currently I think one GE judge holds too much ability to tank/raise a band's score.
TL:DR If you think Texas bands sound better, you're correct. But BOA has designed it's sheets to help level the playing field for places that do not have the systems or resources that we are lucky to have in Texas.
For clarification I am not saying this is true for every non Texas band. Plenty of out of state schools allow for homogeneous classes, and play with great tone and intonation (even though Texas is still the best at it 😉).