Kickers and Punters grow about the same as everyone else, but it only equates to a yard or two per punt or a couple of percentage points better on FGs. On the other hand, not carrying a kicker and punter can hurt you. A punter kicking field goals will hit around 60-65% vs a norm of around 85-90%. Over the course of the season, that is giving up about 2 points per game on average. Having a K as a P can hurt you as well. A K will be hard pressed to hit 30 yds per punt vs an average of 40-42. So over the course of the year, and say 6 punts a game, you are giving up 60 yards of field position per game.