Well, he acts quite foolishly during his Madagascar assignment, and his partner (Carter) is a dummy. His reaction to neutralize the bombmaker was quite out of proportion (blasting an embassy!!).
Maybe he learnt a certain sense of measure, and to choose his partners better (or to o by himself)?
He is also badly betrayed, by Vesper, and supposedly by Mathis (which is unsure now, but in CR he appears finally as a bad guy). The lesson should be: watch your back yourself!
He was tortured and nearly emasculated...his ego was bruised as a result. So, I assume he'll be wiser for the wear.
Er... Do you mean that emasculation makes men wiser? Well, all things considered, maybe... after all, it makes cats nicer, that's certainly a clue