Decent build. I presume those other upgrades will go to speed...
Str/Tkl/Conf should all go up. You aren't missing many tackles, so the deficiencies aren't killing you, but with such low confidence, if you get beat a couple plays in a row or miss a couple tackles in a row, your in-game morale will be so low that you'll be completely ineffective.
I'd start pumping First Step and Quick Cut, too.