Did anyone ever stop to think that...
Drug dealing was removed because trevor didn't produce any product during the campaign, and micheal and franklin aren't dealers.
That Pimping was removed because it would make no sense for any of the three to be a pimp.
That Gang wars was removed because gangs served very little purpose in the story and were all small gangs.
and ect. but perhaps most of these features were removed due to the story?