I think the problem with these tests, they are tested on holidaying. One tactic can be great when instant resulted but when you play the game its a total different game. I dont think its possible to test tactics while playing the full season because itll take too much time.
No offence to your tactic making but it should be easier if your using the wonderkids, surely. yeah they havent developed but probably are more developed than most in the league already. The tactic is giving a false reading in my opinion