Could we make prelims best of 10 but you play 12 and drop the worst 2?

Since prelims are more or less a measure of individual skill level to determine ranking, it would make sense to allow for a "teammates are awful" bias. Everyone has had games where they were doing ok but their teammates lost them the game. Other teammates that AFK, start tilting, and/or intentionally feeding are things that you have minimal to no control over. SO why should you get punished for it?

So why not make prelims last 2 more games (12) and then drop your two worst performances.