How can you tell when the lapels are blowing?
What does 'crazy extension' in the shoulders mean?
Do you mean his suit is too loose in the waist?
I am not questioning what you have said, I am trying to understand what you have said.
Lapels: In a head-on shot, the lapels should make a "V" with straight sides. In your picture, the sides of the "V" are curving.
Shoulders: The shoulder of the coat appears to extend well beyond where your shoulder ends.
Waist: Looks too tight to me.