I'm not so sure about that. Playing multiple guys 30+ minutes routinely has been a relatively recent development for us. In some brief reviews of the archives, Jamie has only rarely played as many as 3 guys over 30 minutes per game. We're deeper than we've ever been and we're playing at a faster pace. It may not happen this year.
It wouldn't surprise me if the rotation stays at 10-12 guys and Mike, James and Jamel are more in the 25-28 minute range in most games.
Milligan and Wilson provide valid depth to keep Robinson fresh, which I think is very important. James just ends up literally on the floor so often that he frequently is beat up. Limiting his minutes should pay dividends because despite his detractors, the offense runs much smoother with him at the controls.
Jamie has to be tempted to play Young more minutes at 5 in many games, but he also has to remember Young ran out of gas down the stretch last year banging against big guys. Jeter can certainly replace Mike offensively at 4 in games when he is hitting. But, there may be nights the 3-headed center is just not effective and Mike's minutes are needed at 5.
Jamel is the guy with the least-proven replacement. Slim oozes potential but is so young. Chris Jones can slide there when he's not at 2. But, neithrr provides the almost automatic 15-20 ppg we've come to expect from Artis.
Still, the real advantage of having depth comes when you use it. It does little for you sitting on the bench.
Jamie has pretty much always played the "main guys" 30+ minutes. Usually, that's 3 guys.
And against Gonzaga, Mike played 18 or 20 first half minutes, while James played 16. Jamel only played 2 because of foul trouble. I'm fairly sure each of those 3 will get 30+ in games that matter.