Based on my own eye test, I'd say it's been effective.
However, this depends on facilities, staff, personalities, etc.
You won't always be able to max your player's potentials.
I generally work on trying to balance my coaching staff across all training fields, focusing on getting the best training in every category, then I delegate to the assistant manager to schedule the training
My main focus are handling players individually and balancing their playing time, especially for youth.
Plus also avoiding injuries, etc.