Are you suggesting the system keeps track of 3 formation and tactics that you can swap between? Just making the process easier than moving players between each match?

I'm sorry, I just don't quite understand your suggestion.

Personally, I do rotate players regularly. Some managers suspect individual players may be a best fit for only certain competitions; for example you might have a ST who rates 8-9-9-10-7 in league but 7-7-7-6 in cup or CL.