i think it would be excellent if:
you could groom young wannabe criminals and start your own "family"
i think it would be good to see the rise of a young thug to gangland boss over the course of the game. (where you give out orders instead of being a dogsbody for far to many lazy incompetent fools)
be able to actually bribe police officers ie (maybe you could meet a crooked cop early on in the game, and you could call him/her up to get info. cue cutscene?)
when you get busted you've gotta go to court hire lawers, try and bribe the jury (and if that fails get members of your crew to kill witnesses with difficulty levels increased the more serious the charge)
maybe they could add a part where you actually go to prison? and do a scum like sub-plot where you've gotta become topdog import drugs etc. into prison via visitors.
these things would probally require too much memory space all together
but i think it would make the game more realistic and surely some bits could be incorperated into the gameplay?
only god can judge me