That said this is Getbig, there’s never been a consensus on a “good physique”, everyone looks like crap...
Yeah everyone looks like shit

Calum may not have been all the way there as far as conditioning but if seen in the gym in a tank he would look ready and almost skinless. Stage lighting is so unforgiving though, a world beater in the gym looks like a glazed donut on stage.
This whole "classic physique" thing is pretty subjective too. I've seen many arguments among fans, is it about the vacuum? Should the legs be small or big? When are you "classically built"? I would say Calum looks pretty classic to me, tall, small waist, legs don't overpower the rest and so on.
But on IG they said there's nothing classic about him
