No, I make roster decisions based on ratings. However, reasonably early in the season, I start making staff adjustments based on stats.
I compare WHIP/ERA/OAV. If the ERA doesn't match up with the WHIP/OAV, I try to find out why. Usually it's a crazy amount of homers.
I didn't watch the Pro Bowl(nor do I know the final score) but I've heard they didn't even bother to play D.