higher rating does not mean better performance. Some players are perennial underachievers. I had a scout CB when I was on level 5, my first ever scout player(bought him when he was 3 points off 6th star). He cost me atleast 8-10 pts that season. I was well clear in the league so didn't mind that. I've realised that if you have a player who is costing you games, persist with him for a few games if he's really good and cost you a lot of money. If he doesn't improve, just get rid and buy someone else. I've got a 2 star CB who has been easily my best in that position ever since I bought him in level 3. So it's not always about stars. Some players are talented, some players are professional. Former doesn't always make up for the latter.