That may be true, but I don't know how we know that, given how poor the Roush equipment and resources are. I don't think we have a good feel for what any of the current Roush drivers are actually capable of, but I suspect that none of them are much worse or better than the pretty large contingent of mid-pack talent in the Cup series. Some of them drive for top teams and have good support behind them, some of them drive for organizations even less capable than Roush.
I have a soft spot for Biffle because I think he did get screwed over by being loyal. It would be nice to see him get a chance in a better ride, but I doubt that a second JTG Daugherty car is that. He'd have more success and more fun if he went the Elliott Sadler route and went for another Xfinity or Trucks championship.