Disney seems to renovate rooms well, closing a building at a time, keeping it as quiet as they can even though you can see signs of the work but this is a different story.
A section of cabanas is being demo'd and the construction of a 15 story building will be major. The placement of the deep support system alone is going to be a big noise generator. Add all the other things they will be building that will impact the lake, the walkways to the main hub, the main hub itself. I don't see them dragging this thing out since the noise impact is likely to be considerable I imagine them doing as much work concurrently as they can.
Major construction at other resorts has come with considerable complaints. Years of folks not happy with the Polynesian work and Wilderness Lodge work - asking to be moved, and right now Wilderness Lodge's work has come with many noise issues. You just can't do the level of work they will be doing without a huge impact to resort guests. I LOVE CSR, but I don't see myself booking during this construction unless they drop rates significantly. I'm not paying inflated rates for my vacation to be dealing with this. On flip side, this might not bother some folks.
Sample of WL noise and they aren't even pounding yet.