I haven't made the transition, but I have an observation which may be helpful.
The 70-200 VR Mk I was notable for having been clearly optimised for a DX sensor. Whilst it is of course an FX lens, the sharpness falls away quite markedly outside the central DX-sized area. (And that's perhaps quite understandable, when you consider that the lens was designed back in the days before Nikon made any FX DSLRs.)
Since you shoot with a D700, that might be an issue for you.