There will be no ties to the ranking.
Many people are in favor of 3 players per team, but skd is right: the objective reality is teams of 4 players. And by the way, if more than a hundred people sign up, I don't see a problem in making 20 teams of 5 people.
All random or trading - we'll probably have to hold a vote.
As for substitutes, I think the last tournament had an optimal system: those who weren't chosen remain as substitutes, they can come in as a replacement in the last slot, while the other players move up to the higher tier. I don't know why Maretti didn't use the substitution.
Of all the ideas expressed, I liked Vova's suggestion the most: to add 2x2 format games if necessary. After all, this is a team tournament :D
I will try to open registration by the end of the week.