Looks like Cal is building a team around Williamson.
He got the PG Williamson wanted to play with. He can shoot the three.
He is recruiting one Big man (Bol) and he can shoot the jumper and block shots, but isn't a post up scorer.
Most of the guys we are after for the wing spots are shooters. Grimes, Garland, and maybe Herro. Johnson is working on his shot, and it's not terrible.
With Williamson as the focus of the offense, he is going to command a lot of attention, and a fair amount of double teams. By putting shooters all around him, it's going to be hard to stop us on the offensive end.
I think this is all by design. Cal has Quickley. He probably returns Green. He probably returns SGA. He returns Baker. He probably adds at least one of Garland, Grimes, Johnson, and Herro. He probably returns SKJ. He is trying to add Bol. All of those guys compliment Williamson.