I would have LOVED to seen Andy in CvS as well... but who would he fight against? Unless he's put up against Guy, there wouldn't have been ank kind of reasonable "dre4am matchup" for him.
As for Goro? He would have been great for the grappler, but Raiden makes a more sensible choice for Zangief since they are both old school grapplers. Characters like Goro, Shermie (and even Clark) are more of the new school type of grappler, and Zangief just doesn't have these types of moves to compete. Maybe if someone like Alex, Hugo or even R. Mika was in the game, they could represent the new age grappler for Capcom... characters like Goro would fit in more logically.