Depend.
All is based in unlock animations, so can AMR placed as MR score, or change the team behaviour in a way that you can notice an improvement? yes, absolutely.
Remember that we are playing a smulator, and it have a system and process to simulate. The matches, works by "scenarios" where from all the available conditioants, only few matter. Too the rating variations, create patters where the players alternate -and you can predict who will contribute following the ratings like 68686 expecting the 8 after 6, and a 10 7 9 9 7 probably means that there will be a push to the max. rating again which is 9-10 (are the same both ratings). then you need to understand that the game does 2 lists, one, for attacking animations and one for defensive animations, and that by having the right settings you'll always get the attack chances despite the mentality you're using cause the engine never simulates the Defensive football style, it is like, right settings=chances and possession bar for you -so here to find the right tactics you pay attention to the possession bar, is the main source of information you have, then, the report and rating variables- so, the attack list of players have players placed first by position and then by dominance power.
There are 2 main powers you have to try to understand to resolve the posible issues that your team can have, one is the Dominance power, related to the "availability to be selected for an animation" or, to the amount of animations that a player can have, and then the Contributive Power -effectivity in chances-
So, you can have a 9* ST with high dominance taking all the animation slots or many of them and having low contribution, this means you'll need to sell him probably to liberate space in the team and have a Key role player available depending on the case.
Then, regarding the Attack-defense list and the AMR placed as MR, by doing this you move the player in the list, meaning that can be overcomed or, can overcome another player, and this depend, on the players that he have arround cause a goal animation, needs usually in assistance, so, maybe as AMR there is another combination of players, doing the job, but once you move him as MR you notice how his assistances ratio, are improving,or that something happens.
Every single team works differently cause each player have different domination power, contribution power, animations assigned etc and thats why the perfect tactic or even when we talk about counters it have no sense, because the engine doesnt simulate tactics exactly. It is always simulating a scenario with options in ON-OFF, and the game wants you to read the scenario and resolve it, moving something, doing a sub, moving players of line or, by doing absolutely nothing in case you have the advantadge.