I'm going to open myself up to maybe getting some negative comments from some here.....
......I personally never use full fine pitch in piston engine airplanes during the approach for a landing...I do however move the pitch control / 's to the full fine position as I close the throttle /'s for the landing.
I find that to work just fine as it is easier on the engine and I don't have to put up with all that noise caused by high RPM. As to increasing drag on the approach there are other ways to do that if needed.