I was thinking maybe the slider comment was related to an outdated fear college pitchers used to have regarding making a good pitch with FB and having the hitter fist a hit bc of the metal bats. Thus the need to throw excessive sliders for the swing and miss. That's the only thing I can figure based on the wood bats comment.
With the new bats I think that fear is gone. Many pitchers seem to pitch to contact more now.
I'm not justifying the comment bc I also disagree but I'm just thinking maybe this was the intent.