Well I've never actually used an EVF, but macro is one of three instances I ever use the LCD. The 2nd instance is in a crowed where I have to hold the camera over my head to get a shot and obviously can't use the viewfinder. Even then I'll often set a high fps, make an estimate, and take 10 shots one handed as high above my head as I can reach. The 3rd instance is astronomy.
With my 40D, I have a 5x and 10x digital zoom in the LCD which does not effect the final shot. Zooming in an extra 10x on a tripod allows precision manual focusing at its finest. Spot on focus every time. I use the LCD with astronomy for the same reason.