Well, that is a tough question, because the starters that year (2017-18) were Crystal, Kia, Gabby, Lou, and Pheesa. It's pretty hard to put any of them on the bench.
Nonetheless, although that team went 36-1 (losing only to Notre Dame in the Final Four on Arike's famous shot), I think it did lack a big presence in the lane, and rebounding was a problem. So maybe it would have been better to let Kia handle the point and leave sophomore Crystal on the bench, or alternatively let Gabby be the 6th person behind a front court of Azura, Lou, and Pheesa. That means that Pheesa and Z would have had to find a way to play together, and/or Kia (as a senior) would have had to learn to handle the PG position.
But there are many Boneyarders (including myself) who think that if Z had started the second half against Notre Dame (or had started the game), UConn would have won. So maybe, with 20-20 hindsight, a different decision should have been made.
I think that is one of the toughest decisions that Geno has had to make since 2016, and I suppose that's why he is paid the big bucks.