From some of what is coming out now you have to wonder if the Tigers had gotten *too* aggressive about trying to change a few guys. Baseball players operate so near the bleeding edge of their body's and brain's limits that I think that sometimes even if a guy in theory *should* be doing something differently, it may not work for him in practice. It's a fine line coaching staffs have to walk between helping guys and screwing them up and no staff is going to get it right every time, you just hope you can put a staff in place that gets it right more often.
For the Tigers, it appears they were on the wrong side of the line for Faedo and I'm guessing Torkelson as well (and possibly Coolbaugh at the parent club in general) but OTOH, to be fair, they also had several guys like Lipcius, Perez, Brieske, Wentz, and Meadows make a lot of progress last season.