I was there recently and I don't recall that there was any construction that was of significance. Marriott has a refurb plan where they do different types of refurb on the 5, 10 and 15 year points. So, they are basically doing some construction or refurb on a near continuous basis. Some is quite minor and some more involved. But the place is spread out and they seem to work on one building at a time, so if they are working on a neighboring building it doesn't generally affect any other building. But, I somewhat recall that they might be re-doing some pool decking perhaps at their main (Palmaras) pool. But I may be mistaken. But they have seven pools and I don't think that they redo more than one pool at a time.
If I were you, I'd call DSV2 and ask what is planned for January.