I also don't agree.
GK trick was great because you could do a massive training in your players and give with a last drill the skills you wanted to every player.
But this didn't have any limits so many managers created mutant/"well trained" players, mostly for playing in asso platinum or top100.
So to keep them like this, they were tanking.
Unfortunately the root of all evil is top100 list, that's why I recommend to remove it instead of playing Police and Thieves and the rest of "normal" players loosing features of the game every while.
But I do recommend a simple and less time-consuming way of training like the old system (and with limits in skills).