We come from Wilmington NC and always take that route. From Atlanta it's basically a straight shot on 24. Mostly flat, no stranger traffic than usual and if you're driving an RV I would think it might actually save you time.
How bad was it with the RV in the mountains. Last year no pop up but took the ATL route. Trying to avoid the craziness that is Atlanta this year but opted for a pop-up. Be honest we can still change our route!