i got your PM but for some reason it wont send my message back to you. Anyways... the 2,000 rpm vibration you feel is the typical hemi vibe. Some are better, some are worse. Yup, some people hate it because they dont understand what it is or what its about, or mostly, why it does it.
I`ve owned SEVERAL hemi trucks back to back since introduced in 2002, every single one i`ve owned does it. I`ve noticed that the MDS hemi is worse vs the older ones. The hemi engine has a lot of harmonic vibrations that is very normal for this engine, mainly due to its design... its not out of balance or anything of the sort, they just have a certain frequency they hit and they WILL vibrate. (some hit it around 2050rpm, some hit it around 2100rpm) Nothing to this day has been known to fix it either. At least not that i`m aware of anyway.
One way to look at it is, the more horsepower and engine puts out, the more its prone to vibration(s) in certain rpm`s and frequencies. And the harder the motor mount material is, the more the vibrations will find some place to go... yup, right into the cab, steering wheel, floor pans, pedals... it will take the least path of resistance. Remember when the intake manifolds were solid cast iron on the old V8 engines... the cast iron intake was a good vibe isolator. Today, the intakes on all V8 engines are plastic... not as good of a vibe isolator so to speak. The more lighter we make vehicle`s, the more prone they become to vibrate.
My brand new 2014 does it too, does it bother me, nahhhh, i know what it is and it dosent bother me anymore than any of the other hemi`s i`ve owned. I`ve put several thousands of miles on these hemi motors, not a lick of trouble, even had some noisy lifters in some, not had one come apart yet. I HAVE toyed around with rubber mounted ballist`s onto the steering column, all that did was push the vibes somewhere else. You`ll chase hemi vibes till the cows come, just nature of the beast.
I know you spoke of the lemon law, this is just my opinion, dont bother. Ther`s nothing really wrong with the truck as per the 2,000rpm vibration. Like i said, some do it worse than others. You also have the best warranty on the market, 5yr/100,00 mile coverage. She blows, you get a new motor free of charge.