Average means you take the highs and lows and add them togethether and then divide by those amounts. If the highs occur in the playoffs and result in a SB win, who cares about 'AV'? This system, while overall does a decent job of ranking QB's, must also have an asterisk with SB winner. show the 'AV' of the quarterback during that SB season and playoffs.
I think this is nice but I also think this is what's degrading sports to some extent. Watch and enjoy. Sports are suppose to be entertainment. Now some treat it like a job. It's a nice hobby to do all this and not get paid .