My understanding of intermittent fasting is that it can encourage "garbage collection" of the body pruning the dead/sickly cells. Weight loss/gain is still driven by calories in/out.
If they had their test subjects eat the same amount to see if intermittent fasting metabolized food better then it seems obvious that there would be little to no difference.
They've cut quite a bit of weight since then and mostly have just focused on keeping their appetite low, and eating healthier more fibrous meals in general.