You do realize the east has won the Grey Cup 2 years running now, right?
Two different eastern teams won the Grey Cup in back to back years by beating a western team that repeatedly gets billed as the best ever?
Last year (and in 2016 as well) the best team was victorious on Grey Cup Sunday.
Those teams happened to be from the east. Who cares what regular season records were? The best team got there for each division and on GC game day the best playing team that day won. That’s the whole point of playoffs. The regular season is over.
If we rely on regular season records to coddle us into the comfort zone of knowing who should/would win - we may as well stop playing championship games.
If we ever get to the point where (as fans) we demand that the regular season records dictate the playoff and championship outcomes - I'm done with sports. Some fans want the season outcome to be a predictable excel spreadsheet. Ugh. We have enough of that boredom in our life already.
As you said - the real stuff that counts in a season - begins after Labour Day.
Just like the majors in golf, you can be down by 5-6 shots thereabouts going into the final round and win. Look today, Johnson was leading by 4 or 5 shots coming into today but last I checked an hour or so ago, was even with some others. Make the cut and from there who knows, just like the backend season of most pro sports leagues.