I agree if the comp reverts back to 10 team comp. The final series should be top 4 as followed.
Week 1 - 1 v 2 = winner to GF loser moves to week 2
Week 1 - 3 v 4 = Loser out & winner progresses to week 2
Week 2 - Loser 1/2 v Winner 3/4
Week 3 GF - Winner Wk1 1/2 v Week 2 Winner.
This format rewards you coming 1st or 2nd and a second bite of the cherry.
Just my thoughts. however I'm for a 10 team comp across ZL1 to ZL4.