CAP493 has it,
whilst we can identify some inexperienced pilots we can't pick them all up. One 16 year old who did his first solo the day after his 16th birthday was so competent on the RT he could have been flying for BA, then I have had guys with years of experience who trip over words which makes them appear incompetent whereas they are simply not good on the radio.
We were always supposed to be informed prior to them speaking to us of QXCs but we weren't and then you would be working traffic thinking this guy is useless only to get a call later on asking how so and so did as they were on their QXC, if we had known it can explain a lot. Whilst in the majority of cases it wont change how you control in some cases it will.
Lets face it most units wont put up a first solo if they know they are going to have to orbit, so why do we expect them to be able to handle flying within a complex traffic environment on a second solo?
As airports which previously were quiet backwaters who no longer are still handle GA for flight training this does need to be tackled, I will bang on about it but someone needs to be far more experienced in all things flying before they do their solo, stop thinking of it as important at an early stage , not driving solo or controlling solo doesn't affect the confidence of drivers or ATCOs so why would it be different for pilots ?
And lets have more communication between ATC and flying schools regarding the pilots experience level , Tyro is the obvious word to use.