I use my NIkon D90 to "scout" for pictures. That is, I take a variety of pictures from different positions and using different focal lengths. But I seldom use the image on the lcd to decide what to do with my view camera. I go home and process the DSLR images, cropping the 3:2 image appropriately for 4 x 5.
I use those images to help me with composition and point of view. I seldom use them to determine exposure. I find my spotmeter provides a better guide when coupled with zone system considerations.