So, game year's over, I'll break down exactly what my DL plan is, and exactly what the counters to it are:
I slanted to the right. So generally this meant that the Left Tackle didn't end up blocking any of the linemen, unless he double teamed the right end. This meant that Cooper was free to attempt to power/finesse move the right guard and hope for a quick win. I _think_ success on this is based on timing, where if you do the power/finesse move right at the time of engagement, you're more likely to win and break through, and I got pretty good at this.
So, how to counter this?
1. Have a strong right guard. There were a number of games where Fitz was blanked because of strong right guards.
2. Keep a HB in to block. It'll buy you probably another couple seconds to throw, HBs are pretty good at cut blocking linemen.
3. Run to the left. The Slant right got chewed up by runs left. If people did it enough I'd have to stop slanting, which kept Fitz in check.
Note: This is totally different than Wellie getting his left end unblocked all the time. Even I think that's kinda shady. (note, this is based on the one play that Luke broke down, I have no idea what Wellie actually does in games. I just know if you slant and crash right, the LDE comes free in a 5 man protect).