It's not a good team, but you knew that. A few comments:
In general, you want better coaches than you are using. Look at successful teams and see what their coaches' ratings are. The patience rating is very important for coaches; a coach with a patience rating of zero is a real problem.
In general, you can get better value for your buck by emphasizing defense. Your D is actually much better than the guy who preceded you in that franchise; keep that trend up and look for even more defense.
Your SPs are scary bad; you're running a bunch of very marginal major league pitchers out there and your last SP is going to struggle at AAA. The most important pitching ratings are VsR, control, VsL, P1; P2 and GB/FB are worth looking at. For a major league pitcher, a rating of 70 is marginal, and 75 is average; a pitcher with control or VsR much less than 70 will need other ratings to be noticeably higher than 70 to be a good major league pitcher.
Essentially all player development occurs in the first 3-4 seasons after draft or international signing. Players who are more than 3 years from that point have little development left; more than 4 year very little. Don't expect much development, no matter what your projected ratings say, if they have that many pro seasons behind them.
Hope this helps.