I think you're right. If Chavis had been on board a little earlier, I believe Malik Jefferson would be an Aggie. Or if Malik would have been willing to wait a few more days to make his commitment. Either way. And if Malik were an Aggie, I think one or two other defensive recruits would have joined the fold as well - maybe Kris Boyd or Holton Hill.
LB Roquan Smith supposedly is one of the UCLA recruits that signed his LOI, but I've heard reports that he didn't actually send it in. I guess he has options still, most likely to UGA.