MC's are the worst ratings I think (though GK get crud ones too) and since you are just starting you want to see if you can fix him. I am a great believer in that how you assign the skill points can make a huge difference in how they do in the matches. If he is young he should gain points fairly quickly so you can play with that. I like my MC's to have very high physical (think about who runs the most miles in a match) with a bit more attack than defense (like 10 15 20), but I usually have 5 on my half. If you play with less you might want your MC to contribute more to defense. And for me it is usual to ignore ratings the first season I get a younger guy. Older guys are harder to change, so one I just got doesn't do well after 5 or 6 matches I think about replacing him.