There's no going back

They can't remove either 5v5 or 6v6 from the game permanently now without uproar from one side of the community, in my opinion. Even if 6v6 isn't as popular as it seems to be. Once they've given it they can't take it away. There will always be 6v6 in one form or another. The only question is whether they bring in a ranked 6v6.

And I say this as someone who has come down on the side of 5v5 during the test after being undecided.

Also, Merry Christmas!