I agree with your assessment of being puzzled by how he did it.
I disagree with your assessment that the madness would have stopped after game 4. If anything was proven this year, it was that he was willing to juggle things all the way to the very end. For more on that, see "Geremy Davis never playing a critical 3rd down play"...
The only thing we can do, is hope that he really is a mad scientist genius and we start winning soon. Trying to figure anything out that happened in 2014? It will make you nuts. I've stopped doing it because you inevitably end up at the same conclusions. You can find plenty of rationalization for individual situations, position groups personnel decision making, individual situation game planning, etc......but when you try to reconcile those snapshots with the big moving picture, it always falls apart. The only conclusions you can come to are #1, that all of 2014 was essentially treated as a 4 month long training camp and scrimmage and the intent was never to actually approach the season on a week to week basis based on opponents and developing the best team we could, that would improve as the season went on, OR, the young first time coach really did try to implement a plan, that he came up with that was supposed to generate a winnign team that would improve as the season went on, and he failed.
Either way, we start 2015, with not much different when it comes to actual game performance and generating wins, than we had in 2014. The only difference is that all the players that played, and are returned will be a year older, and year more experience in their individual roles. They will still need to learn and demonstrate coming together as a team to win, rather than a group of individuals performing individual tasks.
The thing is - either way - whatever happened in 2014 - be it intentional 4 months of scrimmages and practice , or a failed attempt at something - just demonstrate improvement. It's sad that's the case, because the only way not to demonstrate improvement, is to repeat as the worst team in all of division 1, but Diaco certainly did lower the bar effectively, to be able to show improvement moving forward.
We'll see in September. Villanova and Army back to back at home to start the season. 9 months to prepare.