A. I believe Hawkins is struggling at the plate because he is playing the 1st base position. Yes he is hitting .301, but if you have been watching his at bats, he looks a little off. He can be a much better hitter if he is able to concentrate completely on hitting. That is what gives the DH position an advantage.
B. Fontenot and Bostick are playing well up the middle. Bringing Long could lead to some lack of chemistry and that would not be good for the team. Bostick is hitting 8-hole. That spot in the order is not a power hitter spot. It is a good defensive player that can handle the bat (i.e. bunt and hit n run). There is no guarantee that Fontenot could play 2B as well as he is playing SS. The ball comes off of the bat completely different than when playing SS. It would take some time to adjust.
C. As for wasting scholarships on players that aren't getting significant playing time, that is complete BS. You put the best unit of 9 (not the 9 best players) on the field no matter if it is made up of 3 year scholarship starters or true freshman walk-ons. You play to win no matter what. It has nothing to do with respect or paying your dues.