damned if you do, damned if you dont.
There is no perfect formation, only ones that beat the others most of the time. therefore, at some point, you should change your formation if you know your opponents formation is effective enough vs your formation that your chances of losing are greater than your chances at winning.
I am a level one noob, and I even know this.
Its like coke/pepsi, everyone has their opinion and believe it to be the right one and the other is bad.
Some people win and dont change their formations, others win with changing them (like me).
I find that most token buyers buy players to form a team and mostly stick to a formation, mostly 4-4-2 as it is one of the more dominant formations.
I have favourite formations (3N-1-4-2) but its not the best against every other formation so I change my formation from time to time because I like winning with more chances than hoping I win with lesser chances, if you know what I mean.
So its up to you. I change formations because I want to give myself a greater chance to win. the game engine is fickle, illogical, and unpredictable at the best of times. The reason for this is the ******** ****** (self-redacted) at Nordeus and their lack of intelligence at programming because they refuse to let knowledgeable football fans with programming experience, program this game. That is obvious only after a few seasons of troll results.
Dammit, this was not supposed to be this long but I got suckered into it. honestly.
It all depends on what you want from this game. I get my frustrations from the game out in this forum. the longer they refuse to fix things and give us information on this game, the more frustrated I get. Let see where this game is in 5 months when my wife delivers our twins and go from there.
Good luck in whatever decision you make. If I end up facing your team, I hope you decide to stick with a formation...that makes my job easier.