Actually What the matter is, enough is enough. One should perform what suits best to him. Look in some movies amit ji ka performance is of a high standard where he performed a character similarly to his age. But what he really likes to do is to compete with much younger actors which is a abrupt concept. youngsters glammer and machoness he has left many years before. So it can't be said that his attraction, acting compatabilities have ended, but it can be said that he must do such roles which better fits to him. Otherwise amitji is a great person.
And about other Bacchans...it can be said that Abhisek has a bright future then when he will come out of his father's shadow. Till Now Abhisek has only 2 to 3 hits (Dhoom, Dhoom2 and Guru).
About Aishariya it can be concluded that she has no acting power. Aishariya can't make a film hit on her own capacity