LOL on out-of-position Hyatt at the 3, you also have an out-of-position Mag.
Some combination of Hyatt/Mag/Chol/Oskar/Wolf have to play well enough you want them on the court together (and Wolf with Cliff).
Another reason you want Gavin at the 2 - someone mentioned he got "lost" a few time early - this is an interesting way to put it. On ball screen coverage, Gavin was playing where he was the guy who bumped the roll man when Cliff or Wolff hard hedged (over hard hedged IMO but that a whole different conversation). Watch this action away from the ball if you haven't. Mag is great at it, one of the things that sets him apart defensively. The job is to basically crash into the roll man when he rolls and stay with him long enough for Cliff/Wolff to recover. Early in the game, Gavin stayed too long a couple of times, St John's did a nice job swinging the ball and Gavin recovered in time to contest, but a little late and guys made shots. One time later in the game, no doubt trying NOT to be late to get to the shooter, Gavin gave Soriano a fully body block while Wolf was hedging, then went right to his guy on the 3-point line, Wolf was still scrambling to get back and they threw Soriano an alley opp for a dunk. You go with a lineup with Gavin/Mag/Hyatt to get Mag in that role with Gavin on the floor.
With 2 small guards, Gavin, a 4 and Cliff, you have limited switching.
With Gavin at the 2, you can switch 2-3-4. And when you do something like zone press back to 2-3 then go to m2m late in the shot clock, you have a lot more matchup possibilities (yes they did that defensively in the scrimmage at least once and multiple times last season).