You can't bring him back... at least not at that number. Sure he'll only be paid in the middle to lower end of starting QBs, but if the option is there to get a Hoyer or some other capable journeyman 1/3 the cost, you're better off spending the money elsewhere (CB, Safety, OL, WR). We are not a playoff caliber team with Tyrod at the helm, and the drop off isn't significant enough from him to journeyman QB "X", to justify not spending the money at some other position of need.
His legs are an absolute asset, and if he could learn to throw first, run second, he could be devastating. I don't blame the line because you watch him go through the progression, and then decide to run when the pocket collapses. If they're giving him enough time to see 4 receivers, it's on him to identify the best target and fire. If after 6 years in the league he hasn't developed any sort of quick twitch decision making (outside of tuck it and run), he's not going to at this point. If Cardale isn't at a point where he's rosterable by week 14, I'm afraid we know where that one's going too.