KJ was largely kicked off the team for academic problems.
Kiana Robinson never got much playing time; I don't blame her for transferring.
Sherwood was not a good fit with Geno.
Since we've got some time, here are slightly different takes on these.
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Kennitra Johnson. Didn't understand KJ was pushed to leave. Geno was taken by surprise when she did. She'd been benched earlier for failure to meet goals on and off-court but buckled down and worked her way into the rotation, ending up with good freshman and sophomore years.
Her departure during the off-season has been attributed to a whole bunch of things. Homesickness; mother's illness back in Indiana; always wanted to go to Purdue and didn't because Carolyn Peck left.
Geno later seemed to feel she got lost, that classes of one were no good because of the isolation (later examples turned out otherwise, of course), implied that the staff hadn't adequately known what was going on with her. Regarding the KJ communication vaccuum and departure, he said "That was bad."
No doubt about the academic problems once at Purdue. She moved on again.
Kiana Robinson. Yeah, PT. Behind that, though, was more than just inability to crack the talent ahead of her. Serious doghouse there, for reasons that were never publicly clear; seemed more push than jump. I'd been talking with Q during her HS senior year (his pre-'Cuse gig) in order to file BY reports; got quite the favorable impression, but what would one expect.
Liz Sherwood. Not so much fit with Geno (who wanted her to stay) as, from her point of view, lack of fit with the UConn system as she saw it. Role model, a role she couldn't see herself filling, was Jess Moore -- uber-athletic (Alaska state triple-jump champ) center who moved in a blink from top of the key to low post and back again. Liz wasn't moving anywhere in a blink, more like an observable progress. Plus, like KJ, she'd really wanted to go somewhere else (Vandy in her case) but got talked into going for a better program by advisors.