I believe that Geno said Z would be the number 1 draft pick in 2019 (assuming she stays for both years).
I also think that Doris Burke and someone at ESPN.com (maybe Graham Hayes) said she would have been the best player in the country this season if she had played.
That's not purely Boneyard speculation.
We saw that she was impressive against UConn. We also know that she averaged almost 19 and 10 as a sophomore, earning AP Honorable Mention AA status. We know that she has practiced with UConn for about 10 months now, and some reports have said that she looks really, really good. I honestly don't expect her to be any better than Pheesa was this year. But if she is about as good, that would be wonderful.