When I have my final output resolution set for 4k, and I start interactive render w/ VFB I get a *huge* window that is larger than my monitor resolution. When I make scale the window smaller, the rendered image still stays at the final render res, and I now have to scroll to see all parts of the image - I can't just zoom out and contain the while image in the window. This makes for extremely annoying workflow - constantly having to resize my render setting output for the purposes of the VFB.
Please make it how it is in max (I'm no fan - actually never used it myself, but only seen it demonstrated), as this seems to be hugely beneficial in workflow optimization.
Please note my other feature request re: "Real Zoom" which is a totally different scenario than described here.