I am a big believer in progressive overload, whether this comes comes from increasing weight, increasing volume, increasing training density, adding intensifying techniques, I feel there needs to to be some kind of progression along one or more of these variables and the focus should be on specific variables for a sufficiently long enough duration to reach your goals.
I see this with several guys at the gym, they train hard but are constantly changing the style of training. They'll try DC then quit after a few weeks and go onto a high volume program for a few weeks and then something like a 5x5 and they are never on any program long enough to make noticeable gains. However, if you are focusing on a certain style of training and just changing exercises, then I don't see any reason why it wouldn't be effective.