I was in this hotel last week and got a room away from the construction on the southern end of the resort. So the noise was no issue at all there. Had to move rooms in the middle of the stay to a room closer to the construction (they were full and didn't have any other rooms away from the construction), but even then, the main noise I heard was buzzsaws (and then, only when outside on the balcony). You can hear them from the serenity pool too sometimes. In either case, though, I didn't find the noise to be that bad.

The main annoyance I encountered was that the serenity pool was much more crowded. I anticipated some more people, but it was much more than I expected. But the crowds did vary by day; there was also a conference at the Grand Wailea (and Marriott people stayed at the Marriott) some of the time I was there.