He played 74 PL games for Wolves. I absolutely get the need to allow players coming from overseas or even stepping up the leagues in England time to settle but this is a 29 year old player who should have lots of relevant experience.
I think sometimes it is better to move on a signing early, even at a loss instead of keeping them and hoping. If the player has an exceptional attribute then they are probably worth persevering with but watching Doherty play he doesn't look particularly quick or athletic, doesn't seem to have much in the way of skill, doesn't seem great defensively and his delivery from wide areas is mediocre. He also seems to always need a long while on the ball before he gets his cross away (which I always think is a sign of a player with a low level of skill... Ben Davies has the same drawback here).
Moving him on though might depend on Levy accepting a small paper loss, which he has always been loathe to do before. We paid £15m for him on a 4 year deal so he'll still have an asset value of just under £11m at the end of the season. Could we get that back for him now?