Well, i play on legendary and i do enjoy the game. I can even deal with the over aggressive defensive AI. But the passing for me is very problematic on legendary. The CPU will always average 85-95% passing accuacy against me. It doesn't matter if I'm a top table team playing against a regulation bound club. They will have 90% accuracy. Even if i sit back and play the passing lanes, i'm dead in the water because if you give them room to take a cross, they will take it. And we all know the result of AI crosses in this game will be a goal.
IRL, the league averages are about 75% (look
here). If the AI made a mistake say 1 in 5 tries, it would make sense to play a more normal "contain" defense and pounce when the opportunity arose. However, with a mistake of 1 in every 10 passes, the only successful way to gain possession is to go in for the tackle wherever and whenever (especially since tackling is so darn easy).
Look at the second graph
here. How many goals would you give up if the AI got off 26 crosses on you?
I don't want to be too critical because I do enjoy playing on legendary, but it sure would be more fun if there were more 50/50 balls and if I didn't have to rely solely on tackling to gain possession.