It's a very good question and I don't have a very good answer at this point.
My feeling (read this as 'a gut hunch based on no actual research') is that cyclical diets (of any sort) do tend to at least 'slow' some of the metabolic adaptations. But I'm not sure that they eliminate them completely. What they might do is allow people to go a bit longer before taking a full break.
Do they eliminate the need (psych or physiological) for the break completely? Maybe....