Withers did bring those things, but they didn't come out much because he spent until late February trying to find his comfort within things. That couldn't have been predicted either way. Being a captain showed up in how he persevered and came out more in his game late in the season.
You are correct it's hard to project with guys that played on bad teams, but if you're referring to Lubin, a major difference between him and Withers is that Withers came from a highly dysfunctional situation, which is a major reason it took him so long to find his spot. Vandy this past season was also ten times better than Louisville two years ago.
As for High and summer scrimmages, we give no credence to those, which is why you don't see us report on them.
In full, you are correct, they are all guesses to a degree, but the roster is what it is, and there are some really solid parts with upsides. it could be a total disaster, but given what I have been told behind the scenes, by gauging how the staff has approached things, and having seen every second Jalen played last season in person except the Bahamas, I think he's going to be a productive player. But will he avoid foul trouble, and can he defend physically and with his lower half? Those two things could determine a lot about him.