From what I know, you have a 21/21 build, Bob. That wouldn't be weak at all even with cut damage.
I think athletics is extremely good, a contender for best stat compared to PS. I think in general the game is a bit biased towards strength users in terms of gear use and stats and what not. You need to play a little more intelligently with an agi build, although it's not that bad since athletics gives a pretty decent advantage. I find my 15/24 with a 34 cut 1h easier than when I used 18/21 because of the better athletics.