Dowie, Good job. Now the only sliders you need to worry about as far as skill set is concerned is the contact slider. You've maxed the pitching sliders out for user and fielding. Can't do much more there. So, if you feel you need a more challenging season, simply lower contact for user and/or raise contact for cpu. Power really doen't do much. This makes things less complicated. I have my PM at -40 because I find my pitchers at 50% by the 5th inning and only 65 pitches. I tend to throw more balls to offset the cpu's timimg.
PS....you will still find that winning on Allstar is relatively depending on the team. Try playing a few games with Pittsburgh vs ST L or Houston to see the difference.