"Dumbing down for consoles" Is just a Bogeyman cooked up by elitists to cry about every change they don't like, seriously. A lot of the DayZ community is hardcore PC Mustard Race and any perceived 'streamlining' is just seen as trying to appeal to the unwashed console masses. The moment a console version was announced just about every change has been put down to 'dumbing down for the consoles' and it gets really tiring. It's doubly amusing because console shooters usually have much more dispersion than mainline PC shooters. If anything things like scope sway, recoil and having to zero weapons is actually significantly more controller unfriendly than dispersion. Really leaves me scratching my head and wondering about the logic behind the 'console streamlining' complaints at times.
As for the dispersion I think there should be a realistic level of it, DayZ should have it's feet firmly set in a certain level of realism both because of it's history, and it will set it apart from the other games that have come out inspired by it. It should be done in a way that will not make it overly frustrating and leave people praying to the RNG gods despite them doing everything right but I don't think the devs will go that far in that direction. Although weapon dispersion has already been confirmed in some way so we shall see if it's done in a way that makes the majority of people happy.