Today's X-Men Marvel Legends "Age of Apocalypse" Sunfire review spoke of the figure doing a better job at matching the original comic designs. Let's take a look.
Here's a colorized version of the original sketch, as presented in the tpb collection:
Notice there was no armor on the abs and the armor on the legs was asymmetrical. Here's a later take on the idea, closer to the final look:
The containment suit wasn't drawn consistently through the entire series, so here's a collage of a few clear shots we do get to see:
So this toy is close, but there's still work to be done. The arms, in particular, should show more evidence of armor than they do.