Eh...while it may have taken a while in the past, Cal has never had a problem benching guys (or at least having them come off the bench as opposed to starting) who aren't producing as expected. Did it with Quade Green, did it with Khalil Whitney.
I think the difference with Edwards (and this is just my guess) is that he is showing out in practice. I am assuming the coaches are all seeing what he is capable of during the week, but for whatever reason, it is not translating to the actual game. He just looks beyond lost.
I would anticipate Cal to give Edwards a few more games, and if something doesn't happen, will pull the plug and have Adou start.