Got Vue5I - haven't tried the resizing of it yet - but I bet it won't change how I use it. So far I only find it good for general camera/composition check, and general light/dark values.

Whenever I'm unsure of whether or not an object is where I want it to be (or not as usually happens) I use the Select Render Area function.

Otherwise when I want to see a bigger view of the composition, I put the render quality to Sketch (with a frame size somewhere around 800px wide or high) - not gonna help you at ALL for the lighting, but you can see where everything lays out pretty quickly, even on complex scenes.
-Lew ;-)