More than likely it is just the much wider track width of the wheels from the new ProRock 60's. Since the track is so much wider now, your jeep is constantly having the tires drive in and out of the groove the other 99.9% of the cars have worn into the road surface. Almost everyone with your setup will notice this at first. it's very common on anything with a wider than normal track width, I even use to experience this with my C5 and C6 Corvettes when I ran much wider foot print wheel/tire combos.
The other factor is that you are running a ram assist set up and this makes your steering much more precise, if not a bit touchy, but again everyone who runs your set up has this same feeling. :thumb: