Having a punter and and not putting points into punting first... wow... that makes no sense.
Anyway, for a start if you want to be improving distance from the off, then for a start, why haven't you equipped the equipment? You're missing four points in punting because of that, when you hit level 8 you'll be missing 8 points. Also, you could go for custom equipment now, which will give you another 6 points in punting. See you could be sitting there with 60 in punting right now just through equipment.
Anyway, start over because if you want the best punter possible you've gone about it in the wrong way, you shouldn't even be adding points to strength at the moment, you should be training it.
My punter was averaging 3 yards more than yours per punt in his first season, 27 yards a punt in his second, 35 a punt in his third, 37.5 this season... see where I'm going with this?
The best punters of all-time in this game only averaged just over 50 yards a punt in their best seasons.