You bring up a great point. Kai & Wolf do have bigger arms. Kai's especially in the back double biceps shot. Phil has insanely huge arms off-season but come contest time when he's dieted down they come right into proportion with the rest of his physique
Meso started that nonsense of saying he was just all-arms. That's what people do they marginalize when they can't figure why their hero isn't doing well.
When Phil does that clasp wrist MM shot that Levrone is known for, Phil's huge triceps "pop" out, showing the level of fullness and detail...and that is about the only time his arms look "big". As you said, they flow with his physique and are not out of proportion.
