10 percent of primary training is given to a random skill.Please understand, I am with you here. I'm not liking the changes. But you have to read a bit more closely. It says the average player in the game will train 10% worse, with the other 10% going to a completely random skill.
10 percent of primary training is given to a random skill.
As an aside, I would not mind the cross training if the manager could decide what to cross train. In other words, decide what primary skill to train and what other skill to cross train (or even if they should cross train).