Did a little bit of testing, here's my low quality DMC who I want to give an extra role. I trained him until he got his second skill. He didn't gain any other skills in between.
-edit-
So GK training trains only GK skills, but not all of them. Others are integrated in attacking or defensive drills. Still not sure how to go about it. Train GK's with the rest of the team? What do you think?
What about the comments at the end of training sessions? Do we have to take them into account? I found this one puzzling.
Total condition loss was 12%, two P&M drills at the end of the session.