Ok, then what do you think the issue is? Since he left here are some SP stats: 26th in fWAR, 27th in ERA, 27th in FIP, 30th in xFIP, 25th in K/9, and 26th in H/9.
Pitching coaches are also important for game day preparation. I think Wes was a guy who really understood how starting pitchers needed to approach their opponent that day. Again, since he left, the starters have been god awful