I cracked and got it. test drive on man u. The training workload of the coaches has went from light in fm 2014 to heavy (for all @ man u) in 2015, so all my players (despite the fact i got in as many coaches + under 21 coaches as possible) are complaining about bit-part training.
You need 3 or 4 coaches in each area now. I am Man Utd and have my coaches workloading all down to average.
Basically hire as many first team coaches as you can, and make sure you can get as good a quality as you can. Then you have yourself and your assistant. Then supplement these by using your U21's coaches and spread them out.
This is how I have mine:
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