I can vouch for the RC and vibration....it's better now that I got a wheel and tire swapped out and the hub rings, but I have a feeling it's about as good as it gets. The funny thing is it comes and goes, sort of acts like a tie rod going out, but they're fine.
I think it's just going to be one of those live with it things. It's not horrible and it's way better now than it was. I think I'll live with it for a year or so and then just get a 6" lift on it.
My theory is the angle of the CV joints and the 'V' shape you get is what causes it, it's probably not the best set up for your suspension parts, but, I don't drive the truck but on the weekends and it's probably fine for a year or so. Assuming the rear end doesn't fall out of it.