What type of improvements can we expect in player development from coaching?

[THE PISTONS]

I occasionally read on the boards that changing coaches will help player development. Kind of like ZT will sprinkle his magic fairy dust over the roster and our Madden ratings will raise from 59 to 73.

This isn't new. Last year, Pollack was expected to do the same thing with the offensive line. It's really hard to compare the work he did though because the line had 4 new starters (Hart/Redmond/Price/Glenn). The line was slightly better than the year before, but still a bottom 5 offensive line.

Then, there was Austin. He was brought in to revive the defense after Guenther left and we saw that disaster unfold. The thing is, Austin was fairly well regarded around the league as a young defensive mind.

Then, Lazor took over for Zampese. Once, again...let the lazor show begin! The offense was good at times early last year, but when Eifert got hurt the wheels came off.

What improvements can we realistically expect as far as player development from these new coaches? Should we expect 800 yards from Ross? 100 Tackles from Jefferson? 6 sacks from Billings?