but as you said formula is only an offensive statistic and doesn’t reward any defensive play (just punishes bad defense & offense). so this formula is only really a good measure of offensive production. not defensive. Thus it gives a skewed result against defensive defensemen and goalies (look at scuderi, orpik, and fleruy). So you’d have to come up with a totally different formula for defensive production (although that would be pretty cool to look at how great players were at just scoring and how great they are with keeping the other team from scoring).

2) i think your powerplay weighting should be (pp drawn * (pp goals/pp opportunities) that way you are weighting their pp by the odds that, that pp will turn into a goal. maybe that is what you intended.

3) what i just said, but with everything else when you’re looking at the odds that play will result in a goal. (shots on goal, etc.)

4) I don’t think you should take into account the end result of the what the player did (giveaway, pp drawn/taken) into his number, just the odds that it will lead to a goal. If 2 players on the same team draw a penalty, one shouldn’t be rewarded less than his teammate because the team didn’t score on his pp but scored on his teammates pp. They both gave their team the same opportunity (unless one pp was drawn against someone on the pk and the other wasn’t). For a defensive formula, it may be a good idea to weight penalties taken more harshly for those who are on the pk unit. Or giveaways in their own zone or resulting in odd man breaks….but then again I think this is what you’re trying to take into account by looking at the end result of what the player did (giveaway, pp drawn/taken). But if that’s the case you shouldn’t be adding them together. You should be multiplying that opportunity by the degree of opportunity it is and the chance that the opportunity will lead to a goal.

5) you take into account giveaways (which leads to a loss of puck control, less time on the offensive, and less scoring opportunities). But you don’t take into account takeaways, which lead to more scoring opportunities.
And it might be a good idea to weight takeaways, because a takeaway in the other teams zone probably results in more goals for your team than a takeaway in your teams zone (although it should be weighted the opposite for a defensive breakdown). Also takeaways that result in an odd man rush should be weighted more.

5) it’d be good to list shoots on goal*(yearly # of shots on goals/goals scored)—-aka the shots on goal the player gets weighed by the chance the puck will go in. And maybe if pp shots on goal have a higher percentage of going in, also listing those separately would be a good idea (including ones taken on pp other ppl drew). Or it may be a good idea to weight shots on goals (a dumpin from out side the blue line be less meaningful than a breakaway shot).

6) do you have unassisted goals count as a full goal…for example, you aren’t dividing it by half? Or how do you account for goals with only one assist?

Sorry if I come off as harsh cuz I‘m not trying to be. I’m just trying to improve your idea cuz i’m sure you put in a ton of effort.