1) playoff format rends 6 months of games not very important, the biggest difference is in your seeding. That's..all?

2) another way it makes the previous 6/7 months pointless is that your entire season is based on a single set of games. You can be the best team in the league by far, but then if one player gets injured or you're out of form or unlucky it's over

I just don't like leagues with a playoff system, you either have a league or you have a round robin, both seem directed toward squeezing tv rights, not awarding the best team of a season.

Not that I disagree with the intent/target of your sarcasm, but there are US leagues where every team makes the playoffs. The Pac-12 did this with its conference tournament for most of its history, for example. One can argue that such is the logical conclusion of separately rewarding the winner of the regular season and tournament.