I currently have AML, AMR and S who make better gains than 5 star 18 years olds by training defensive drills. Likewise DC, DL and DR training with attacking skills. None of whom were at 340% in any skills before the last update, OK they were getting close, but not "mutants".
I have a GK struggling to gain anything and a DMC who I can't improve no matter what training I give him. My MCs are not much better.
Tbh during the last few days I've reverted to the training I did as a newbie. I don't give a toss what drills the players are doing, just as long as they get every last % avaliable.
This update to the training system has killed just about all interest for me. I can see a long summer tanking break on the horizon.