SC I've actually done something similar and we've deducted points for turnovers and guys can gain or lose points based on FG shooting. I go as far back as Pervis Ellison doing everything to dominate a college basketball game and routinely throwing up 50's. It was so great to see his game translate to the NBA.
I've always said Hollinger stole our shit and just tweaked it.
Game Score; the formula is PTS + 0.4 * FG - 0.7 * FGA - 0.4*(FTA - FT) + 0.7 * ORB + 0.3 * DRB + STL + 0.7 * AST + 0.7 * BLK - 0.4 * PF - TOV. Game Score was created by John Hollinger to give a rough measure of a player's productivity for a single game. The scale is similar to that of points scored, i.e., 40 is an outstanding performance, 10 is an average performance, etc.