This Carlson person should be taken out to the shed, but that aside,
Diaco indeed deserves to be raked across the coals for his "preparatory" phase comments publicly, for exactly what you, I, others express as reasons since the post game BYU comments. THe proper person to really have done it, is his boss Warde Manuel, and it should have been done, clearly, the morning after, for exactly the same reasons you just wrote, and others, have in the past 2 weeks. Nobody in the media has really said anything except for "gulp" Jacobs, and then we got the scalding response that it was "dangerous." Our media following is worse than a daytime soap opera. Losing, bad football only accentuates it. That's where the boneyard, I love this place, tends to really straighten out the ship.
It's actually been a little fun to do it, in a sadistic way I guess, because I honestly do not believe he does not intend to win these games, and it's difficult juggling act to be trying to get experience and max reps, and develop your own schemes and at the same time game plan for opponents, but it was just a dumb, dumb thing to say publicly - as was his comments about getting Puyol work from the right hash.
But he's a rookie head coach, and he gets another mulligan, for another week. He earned, it, and he totally backed into it, by mistake, and has indeed pissed off a few long time fans because of it, but it is what it is. I'm not anywhere near giving up on the guy, not at all. He's demonstrated some serious progress, I think in 9 months, in very important ways.
It will be interesting to see what he can get this program to do, once the season actually starts! ;-)