It was probably already mentioned here, but it would be great to tweak training of faceoffs skill for centers. I have 21yo center, who is 91 OVR and he has Faceoffs skill of 80, which is by 9 the lowest skill he has. I understand there might be centers not good at Faceoffs, but with this large margin there is only one name for them - wingers!
He is taking plenty of faceoffs and still he train all the other skills faster. At 21yo, he gets like 1 Faceoff skillup per season, so he will never be 99, perhaps not even 90, while he will be otherwise top player.
And it is similar for many other young centers I have or I saw out there. There are few great faceoff takers, usually very high on draft, but that's like 2 players per draft.