Don't know if this all ready is in the game, but hidden for the manager.

My suggestion is that you can train/use your team a formation making it better and better in this formation.
Players that are always in the same position and formation should be better and better the more matches they play like this.

Using another formation that is very similar, whould also benefit from the experience. Fx playing in 4-5-1V and changing to a 4-1-4-1 is a little change and most players that are good in the one formation will also be good in the other. But changing to a 3W-4-1-2 is a formation the players are not used too and therefor not as good in.

Players should learn by playing the formation, also in friendlies (making friendlies usefull!). New players in the team will take some time too play well in the formation. This making it more important so use the players for more than 1 season, when they play well together.

This could also be used in the match report, as an information why it was a good or bad resultat.