I don't know Miami - It appears though that you are straddling the fence on this issue, perhaps covering your bets. We have three folks possibly four who are capable of handling this position for some minutes in games: Stokes of course at 6'3", Tuck at 6'2", Kaleena whom we have seen step in and do some work in the paint in the past - she is strong though 5'11", and Stewey at 6'4". That's a lot of height. And we have had years in the past where we had roughly the same personnel, and they were championship years. The first that comes to mind is 1995 with Lobo, Wolter, and Jamelle granted Kara was a huge presence at 6'7"
The second and third that come to mind are the two years with Tina where we won the championship - 2009 and 2010, both with Maya Meghan Gardler, and Kaili McClaren.
Granted We have not seen the full force of Tuck given her injuries, but what I saw when she played with her injuries was pretty good, and she can shoot the three as well, and Kiah could still be considered a question mark - yes she shined in her minutes last year, yet will that carry forth in a(n) (assumed) starting role this year. It remains to be seen. And yes, the offense did run through Stef at the high post, but that is something that didn't always happen at UConn, so that likely will change as it is nothing new to Geno and the coaches at least. I think that the last time we had a post with that talent was when McClaren was on the roster.
Still we have some height, no more or less than past championship years. It is up to Geno to put the pieces of this year's puzzle together. We will be rated #1 at the start of the season, and it will be interesting, as always to see how the season plays out.