Dont know if you caught my post about some users having VR problems,well i have just read a piece from a guy thats tested 3 or 4 of these lenses with a D810 and a d7200,no problem with the D7200 but he has had problems getting sharp images from the D810 combination using VR,his tests have concluded its a vibration thats caused it from the mirror,he has cured it by fitting the battery grip.
I have no explanation how this has achieved it but thought i would post it for you to log in the back of your mind just in case.
I read about it a while ago but after the Tamron I'm pretty used to VR problems.
I'm not a real VR-user and shoot 90% of the time without. The moment I can set the shutter to 1/400s or higher, I disable VR.
She's still not available here so I'm still thinking about my prime options. It's basically the last lens I need since all my other lenses cover the whole range and are sharp enough to keep me satisfied.
I'd be using the lens most on the D750 anyways. That one I can push harder.