I would posit that "contest shot" is only for whether the defensive player challenges the shot or not.
If you want more 'contact' on shots without the defender leaving his feet (looking stupid) I would say that On Ball D rating is most important.
Inside and Contact shot frequency might help as well.
Blocking slider is for accuracy of blocks. Wildly swinging would fall under contest shot tendency, the accuracy of that contest would fall to blocking rating (slider), its possible hands (rating) is in the mix as well.
So; OBD + blocking + hands (?) + DAWR + contest shot tend = Defense for shots
So; OBD + stealing + hands (?) + DAWR + on-ball steal + steal success = Defense for shots
I would also like to say that I believe off hand dribbling rating is the rating for all off hand things that happen in game, ie (stealing with off hand, blocking, dribbling, layups, passing) coupled with the rating of w/e it is, ex: stealing + ohd = off hand steal rating