Disagree and agree:
From watching a (real) football match I can easily see if a club is playing with 3 forwards or not. I can tell if one team is pressing the other or not. I can tell if one team is using man or zone defense. I can tell if one team is roaming all over the place or sticking to their position. I can tell if the defensive line is playing deep or is pushing up. I can tell if a team is playing attacking football or is "parking the bus". However, even an experienced scout cannot tell what kind of philosophy the manager took or whether the team was instructed to play more creatively or not, and this information should be omitted in every case. Sometimes managers reveal this during interviews but not usually. The key here is to have tactical versatility imo. Play with 3 forwards if you can get away with it, but have alternative formations and tactical combinations you can use, too.
However, I agree that it is too easy to see other players' game match tactics, particularly after the fact. The only way this would be possible in real life is if the game was televised (and could be recorded and re-watched), and only top level and cup matches are commonly televised. Otherwise, you'd have to send a scout or analyst to watch the game in person, which would need to be arranged before the match happens, of course. Therefore, I think match formations/tactical info should only be available ex post facto for top level, WCL, and cup matches, if at all. Otherwise, one should need to arrange to send a scout/analyst to a particular match before it happens in order to get this information. Alternatively, perhaps this information would be available while the match is actually happening, but not later.