I wanted to write this even before the start of the FB, just now a convenient moment came up) The most optimal system for a tournament, in my opinion, is the mini-double elimination that is currently taking place in Lyubimchiki. The absence of unnecessary games, spectacle, and simplicity - what else is needed? And all these group stages and round-robin formats are a thing of the past, they can still be used as qualifiers, but not as the system for the main tournament on ХВ.
Only weaklings will propose double elimination. Because it gives them at least some chance of victory. But you try to defeat 9 opponents who have passed all the qualifiers and score the most points, you will immediately feel a very good difference. Considering that the final part of the FB includes players who are tournament winners.
Added after 1 minute
Thanks for writing "very close to ideal" rather than stating it is one;)
Yes, it would be ideal if Pit, Maretti, Numone, Stinger, and others of the same level participated here.
Стримы и обучение тут:
https://www.youtube.com/channel/UCWlnXU5R5RLCMuWzIpBc65Q