I second that, for the no more random lane changing part.
It's like the motherfuckers are intentionallly trying to cut you off, and get in your way when they see you coming along behind them.
It takes me like 10 minutes just to get across one of the bridges in GTA lV. Just because after someone cuts me off, I have to park my car so it blocks the road infront of them, I then get out and shoot the driver, as well as any passengers who are also in the car, along with anyone honking their horns at me. This ends up happening multiple times to me before I finally get off the bridge. And ofcourse the police interfere with my efforcement of other drivers road etiquette, and I end up having to correct them as well. It drives me crazy.
All in all it would be much easier if the traffic in GTA V was better, compared to the aggravating crash into my car ( just after I visited a Pay N Spray ) every second of GTA lV. Accept it would be ten times worse because Rockstar's bringing back Car Modification for V. So your car which you just spent 1000's of dollars on get's rammed seconds after you modded it, wouldn't that piss you off?