As for your question, I have seen AC in a game only a couple of times and he looked raw so, yes, your suggestion may be wise and, no, he did not look ready for our first team.
So I agree with you.
But I doubt very much AZ said anything that would jar with that, and I suspect you have the wrong...
Stand in silence with folded arms as Andone leaves the pitch. That's what I and folk around me did.
Clapping can be reflex, like when some celebrity mug is introduced on a telly programme, the audience claps, and the celebrity claps along.