He isn't going to get playing time just to give him playing time. There is no point in making an effort to giving him pointless snaps in garbage time.
Don't forget, Wimbush has two years left. If Wimbush is better than he has been and plays to his reputed ability or if Jurkovec is better than both Wimbush and Book, Jurkovec isn't going to see any important snaps in 2018.