L4 makes sense for my team, offsets the higher player salaries I'm carrying a little and allows for a low cost signing bonus. I am training players, but they are already highly skilled. The more they train the more expensive their salaries are.
My goal is to get each player to a rigidly defined overall skillset so they improve but at an efficient salary rate. In other words it's not about the speed of training, its how accurately I can plan and predict their pops to avoid even slight training over a certain level.
This might also be the case for lower division teams that are training big men, whose salaries drastically increase above certain skill levels.
"Well, no ones gonna top that." - http://tinyurl.com/noigttt