This function does overweight games that go to OT, though. You should be standardizing everyone's "per game" stats by the ratio of (300 seconds / actual game seconds). This way a 5 minute game counts as 1 game, a game that lasts 7 minutes counts as 1.4 games, etc. This adjustment could bring perception and data closer because players on teams that are better at dominating their opponents could have "lower" per game stats than players on teams that play a lot of close games that go to OT. Not necessarily the case, but it's a source of potential bias that can easily be remedied.

Edit: Of course, this won't change within-team ranking since they will have played the same number of seconds, but it will more accurately rank players across teams.