Jumping up to Superstar would help. I played with these sliders on Superstar from the jump and they translate very well. I believe you get a better game out of these sliders on Superstar but its all personal flavor.
Just give it a shot on Superstar before making any changes and see what you think. If you are still blowing out teams in the 1Q then a change may be what is in need for you.
Also, I do not play with Bed's roster as I am on the 360, but I have seen and heard lots of people get great results from his roster.