I try not to control my back four and what’s interesting was, I saw Match of the Day last weekend and Martin Keown spoke about not moving your back four, you don’t want them out of position. It’s for obvious reasons. It’ll open too many gaps.
Players lose grades when they’re out of position. So try to keep them in position as much as possible, at least when defending. Making all of your passes helps too. When you have a corner and you have your CB’s ready to head the ball, try and cross it to them. Check out a corner tutorial on YouTube on how to score more frequently with corner kicks. Making tackles and I don’t mean sliding tackles or even standing tackles. But mark your man, stay in front of him, if he beats you, then your grade goes down because he’s run past you or whatever. I don’t know the controls for Xbox but for PS just be patient and use “X” to make the tackle when the time is right.
All these things combined should up your CB’s grades. I don’t think it does anything more than keep your players in form. Last year in FIFA 14, I believe that it helped the progression of players.
As for the substitutes, the good times to sub was something I saw in an article which, for me, was interesting. It has no affect either way in FIFA.
But yes, I know exactly what you mean. I saw this in FIFA 14 too. I’m not sure if it’s a bug, but when you do sub a player who might be 9.8 in a game, you sub him and then by the end of the game he’s like 8.9, it’s silly. And I don’t know why EA do that.
But I’ve had subs come into the game and score one or two goals and get a solid 8.2 grade. I think (just like real life) it depends on a few factors. What the situation is. If you’re 4-0 and your sub scores two goals, then maybe he’ll have a 7.2 grade. But, if you’re 2-0 down and your sub scores two or three goals, he could have a 9.5 grade. It depends how important the goals are. If he doesn’t score goals, but has a good game, then - also depending on how much time is left - he could get any type of grade.
So yeah, I don’t know about the player grades going down, that annoys me too. But I hope I answered your questions! Good questions too by the way!