Having an option to play both types of dungeons would be a good idea. Replacing the originals with Master Quest dungeons probably wouldn't be fun at all. The main "challenge" in most Master Quest rooms was looking for the out of the way eye/step switch. There were very few things that actually...
I do enjoy cheese nuggets, but not as much as the person you may be thinking of. Thanks to lactose intolerance I can not have a cheese nugget, so my emotional attachment to them is at a record low.