A more critical analysis of KKL came to me as an afterthought. It doesn't take away anything from the movie at all for two reasons: The movie is genuinely good; and secondly as my favourite playright GBS put it, "A critic is one who leaves no turn unstoned"!
The part that I'd have liked to see made differently is the absolute ending. There's too much wrong with the ending according to me. The elder brother deserved better & that is what should've been shown. The younger brother deserved much worse and that is what should've been shown, instead of showing him happily returning to his piano. I know for a fact that guilt makes each day unlivable! How happily they've shown the misguided youngster return to a life of normalcy. This according to me, is one flaw in the movie. In short the ending is further from a happy ending than I would've liked.
Maybe viewers with a taste for the quasi-realistic don't share my problem with the ending.