From the LA area here, let me break this down so you understand the differences here between UCLA and USC in this recruitment:
UCLA held off on offering Kaaya early because they had one of those "silent verbals" from Kyle Allen, possibly the #1 QB in the class, depending on who you listen to. Put their eggs in that basket. Allen changed his mind and committed to Texas A&M...long story, but basically, an "advisor" who sort of maneuvered him there. Meanwhile, RS Freshman QB TJ Milweard realized he was 3rd, maybe even 4th on the depth chart and transferred out just before the season started. Suddenly, UCLA is holding 2 QBs less than they thought they had--good reason to open it up and consider kids you might have not offered previously. Also, may make sense for the recruit--knowing the competition has thinned out. UCLA has Brett Hundley, the starter, a third year Soph who some are projecting as one of the top two QBs in THIS YEAR's NFL draft should he come out early (behind only Bridgewater), Asianti Woulard...Freshman...last recruiting year's #1 Dual Purpose QB according to ESPN.com and the MVP of the Super 11 QB Camp, and Jerry Neuheisel, RS FR, son of former coach...After that, it's just walk-ons...IF Kaaya would switch to UCLA, he could immediately be in the Top 3 on the depth chart...
USC is really an interesting read...I think they offered Kaaya now because Ed Orgeron was named interim head coach...Look at his history with Ole Miss--his MO is to offer EVERYONE...Ogre led the nation in offers at Ole Miss...offered just about everyone on the Top 100 lists whether they were considering Ole Miss or not...And Orgeron is about as far from even having a job three months from now as any interim coach in the history of football...You don't know who the coaches will be, don't know what offense they'll be running...nothing...If you are a recruit, you really can't take this offer too seriously. SC currently has the following at QB: Cody Kessler, RS Soph starter, Max Wittek, RS Soph--almost beat Kessler out of the job, started briefly last season when Barkley went down, Max Browne, Freshman, last season's #1 ranked pro-style QB...then they have just assorted walk-ons. Kaaya shows up there, he's likely #4 on the depth chart...behind two guys with starting experience...
But, beyond that, as I've said, I don't think SC is a viable threat...
Kaaya's going to Miami...unless he changes his mind and decides to stay home and play for UCLA...Anyone else is simply not a player in this game...UCLA is a viable threat for multiple reasons, including some personal connections...No one else is...He's NOT just reopening his recruitment...