As someone who agrees (at least after the fact) with about 98% of Geno's coaching decisions, I offer this topic for off-season discussion:
In your opinion, what was Geno's biggest coaching mistake in recent years? I'm not talking about recruiting misses, or indeed anything related to recruiting, transfers, or early departures. I am asking about the decisions he made, taking the roster each year as a given -- decisions with respect to the starting five, the bench minutes, the offensive and defensive strategies, or specific in-game decisions about substitutions, time-outs, etc.
Here is my nomination (I recognize that it is a close decision, and I can see the rationale for what Geno decided):
At the beginning of the 2017-18 season, Geno had to decide about the starting lineup for the year. Of the previous year's starters, only Saniya Chong had graduated, so four out of five starting positions were set in stone: Lou, Napheesa, Kia, and Gabby. For the fifth spot, Geno had to decide between Crystal and Azura. He chose Crystal, and what a disaster -- the team notched 36 consecutive wins including 8 wins over ranked teams, before losing to Notre Dame 91-89 in overtime on the shot by Arike.
I think he should have made Azura the fifth starter. It would have caused some discomfort -- none of the other four starters was a natural point guard, so someone would have had to do a position transplant. Moreover, the offense would have had to change entirely to work around a big post in the paint, who would have needed a touch on almost every possession, instead of the small/fast approach that UConn actually used. Finally, Azura didn't really want to be a paint banger (just like Liv today), and might not have taken to the role that Geno would have given her.
But in the end, UConn needed the size in the paint if they were going to win an NC that year, and the actual lineup did not provide that. If they had gotten by Notre Dame in the semifinal, there is virtually no chance that they could have dealt with Baylor's Cox and Brown in the Final. It would have been better to groom Z as the inside presence that the team needed from the beginning of the season, so that by tournament time, she would hopefully have been comfortable in that role.
And I think there is at least a chance that if Azura had received the grooming that such a role would have entailed, she would have used her last year of eligibility in 2018-19. If she had, I think UConn would almost certainly have won an NC in that year.