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I suggest two more options, both with 8 rounds, as is customary in SOY.
The main question is, how quickly do we need to finish the tournament?
At the time, I played the final game on June 9th.
But whether it's 7 or 8 rounds, on average, it will still take another month!
Let's vote quickly on the further tournament format.
Option 1 (from the screenshot) - 8 rounds
Option 2 (from the screenshot) - 8 rounds
Option 3 (from Pit for LM) - 7 rounds
Option 4 (from Dirty_Player) - Olympic-style + final, 7-8 rounds
You can revote, but please do it faster.