If there is one thing I would prefer, it would be a more realistic, natural, gritty tone.
The characters in particular feel a little bit cartoonish to me. Maybe not by game standards, but for example by movie standards. This for me is the worst "GTA vibe" I get. I don't mind the driving or shooting, it seems to me that both work well.
Of course this is just a case of subjective taste. And this is certainly more to my taste than Bethesda Fallout's, where the campy/cheesy/comical undertones make the world less immersive for me.