For the most part, the arms look pretty decent. The main problem is that the biceps are sorta merging with the pecs and this is mainly because in profile his deltoids aren’t wide enough and the rest of his arm is too wide. I understand its supposed to be an exagerated style, but I think it’d help quite a bit. In the front view the deltoids should be overlapping more of the pecs by coming in more towards the center.
As for his torso, it definitely needs a bit of work. His pecs are a bit too round overall I think, and his abs are too wide. They should not reach to the edges of his silhouette in the front view. His Lats and obliques should be visible on the sides.
Anyway, what I suggest is taking a careful look at some realistic anatomical diagrams, illustration or reference photos and exaggerating some of the forms as you see fit, but keeping in mind which muscles overlap and should be visible from certain angles, just to make it look better overall.