No you're right. SC needs(ed) Williams way more than UConn. But not only does UConn need ONO more than SC, UConn's style of play fits ONO better than perhaps any WCBB team.
As for A'ja, Dawn likes to put her at the high post and use her passing skills, as a decoy, and to take advantage of her shot from there. Not on the right, left or arc perimeter, where ONO would find a home at UConn. Her emerging game mimics Pheese's, and UConn's movement oriented offense would better suit ONO's skillset and body type.