Being injured this long, he has had plenty of time to look at the playbook, watch film, etc. And after seeing Cousins start it's clear he's not the guy so short term job security is no longer an issue. RG3 really has no excuse now. Yea it'll take a couple games for him to get back up to speed or whatever, but after that?
I hate seeing a black QB go out like this but he did it to himself. At least with Geno Smith you know he's simply not NFL talent, but RG3 seemed to have it all. Arm, mobile, pocket passing, seemed smart, etc. Dude was on the verge of being a superstar. But now Russell Wilson, Andrew Luck, etc have clearly surpassed him by a mile.