No. It should be at the option of the individual players each round. I like the option of being able to draft in a few friends. And I like the idea of a pro fam.
Perhaps we'll have the option to stay in fams at least from time to time. Like every 2 or 3 rounds. When you have a great team going it sucks to have to break it up all the time. Some times I'd like to stick with it. But I think on average 2 rounds together is long enough to prove a good team. 3 rounds without reshuffle should be the max.