A team or player cannot "like" or "love" a formation. These are emotions and are not programmed into the game. butterfly formation has its strengths as well as its weaknesses. it all depends on the formations and quality of your league opponents.
I just disagree with finding a "right" formation for a team. What is normally done is to find a formation and pick the proper players to fill it. I have multi-purpose players that allow me to play any formation. And I dont often lose because I choose the proper formation to play against my opponent. When I do lose, its not usually about formation.
to the OP: 5Q difference is not miles ahead. It is a nice buffer zone of quality, but hardly overpowering. when you get to 10-15Q ahead of the opponents and lose, then you have every reason to hit the VENT THREAD. You have to realize that up to 5Q, it is fairly regular to have a tough game.