It wasn't a speed issue. I only had 2 big offensive plays. First, I had a deep pass to an uncovered WR, where he had personally moved the safety out of position. Then a 60+ run where the left side of the line sealed it off, and I juked the remaining tackler. Speed on those plays didn't really matter.
I did have a number of INT returns, but it's hard for me to say how speed affected those, since at least one was returned by an LB whose speed was no better than low-to-mid-eighties, and all of his WRs are at least low 90s. I mean, I have some skills and evaded some tacklers. It just seemed that the INTs were out of control.