Regarding our 3 ball defense, I am sure it looks pretty bad and can leave a bad impression as we continue on with the same defensive philosophy. However, it is not the 3 ball defense that has gotten us into the trouble in reality. Statistically speaking, our opponents have not been making them to critically hurt us with any consistency. It is just that when the ball line defense fails, it does so utterly and completely along the perimeter. However, that does not mean the opponents make them at will when our defense falters. Of course, one can argue that eventually the law of large numbers may catch up with us, and the opponents will make them at a higher % with better consistency. But, until they do so, if Tubby feels that shutting down the interior is the priority, he may do so. Especially, with the possible depth issue in the frontcourt in case that Mo gets redshirted, it is not such a bad idea as our opponents will have to think twice about attacking our bigs.
Of course, with the defensive philosophy, we will be relatively more vulnerable to the teams with lots of 3 ball threats with little interior offense. For that, I agree that Tubby needs to make tactical adjustments. But, abandoning the whole system seems premature.
The biggest problem over the past two seasons, I think, was that we did not have enough good man-to-man defenders on the perimeter. Once Nolen went down, Tubby chose to leave the perimeter more open, it seems. And, I do not believe it necessarily was a tactical mistake. We just need to keep track of our guards/wings and how they cope with it. If there is a room for improvement because some of them are good defenders, then Tubby should do so depending on match-ups.
Again, I am not saying the 3 ball defense is not a problem at all. But, it may not be as big a problem as many seem to think.