Not sure could be that he started out really late on sliders and one of the sets are only for FBG downloaded rosters during gameplay.
As of last weekend I read where he might increase CPU tackling to 100 and lower Human Run Block to 0 (FBG sliders) but I'm not sure if that has already been done yet.
I've had some really good games using those rosters combined with slow speed prior to EA's update on the toss plays. Now, I can utilize my entire run playbook on slow speed and see how that works out with the fixes.