You are right that our opinion on the Boneyard might not matter, and Geno does have a long history, as you described of going with a short rotation. He did go 10 deep for a couple of years around the turn of the century, however, and this team will probably have as much if not more talent on the bench than those did. So he has done it, but very infrequently, and the last time was about a generation ago. We will see one way or the other.
As for the time for experimentation, Uconn's schedule is in reverse compared to most top schools. They schedule light out of conference, and use those games as a kind of extended training camp to settle down and prepare for their more challenging and important conference schedule.
For us, to get games against top teams we have to schedule most of them early before the conference schedule. We have several games where we are thrown into the fire right away, so if a new player doesn't earn a rotation spot in training camp they may not be part of the early rotation at least in big games. After that we mostly have conference games we know we are going to win, and have opportunities to "experiment" if we want to, to evolve towards whatever lineup combination would put us in the best position for the postseason.
So some players might make enough of a mark to be in the rotation of the first big game (say Azzi hypothetically) and others might try to earn a spot after proving themselves during the conference portion of the season when Geno could go deeper if he chooses to.