I feel like the 2k slider makers have it wrong in thinking that whatever difficulty you use as a base persists after slider changes. I started with eccentric's first set and even though SS was my base, it was absolutely not SS AI.
So I went to default SS for a bit and got much better games. Saw his V3 and gave it a shot and it plays much better only the AI on offense was horrible. Wasn't so much shot percentages as much as they just felt dumb. I made a minor tweak to one of the awareness sliders (5 points in favor of AI I think) and I've lost 4 of the last 6.
It almost feels like the same system from Madden years back where difficulty level is dependent on slider thresholds/totals