I have a different matrix. I call it dominance tracking because I try to determine how dominant a qb is. I break down dominance into 3 categories: dominate moving the ball, dominate scoring, and dominate reliance by the team.
I convert sacks and ints into attempts and negative yards. Basically a sack is a failed attempt so I add them to attempts, and negative yards to to total yards. I input selected number for negative yards for all qbs, -7 yds for sacks and -20 for int, and not the actual return yards bc that is team and game dependent. I also add 3 failed attempts for each int because an int is like 3 and out. I also add rushing yds to attempts and completions and yards. Fumbles the same way, -7 yds for each fumble for all qbs.
In the end everything is converted to completions attempts yards and tds and from there its a formula.