Response posted here is mine. I copied it from a different thread on the same subject.
"I had reservations at VWL for the first week in April. I made reservation unaware of construction, so when I received letter from Disney notifying me of construction, I decided to change reservation to BLT.
While at WDW in April decided to go to WL to get a idea of where the cabins are being constructed and extent of construction activity. Noise did not appear to be an issue in the restaurant or lobby area and one could navigate around the pool area ok. Construction was along the lake shore to the north and east of the existing buildings and was pretty extensive, meaning lots of heavy equipment and workers, etc. I think it would have been ok, but ok with decision to switch and wait until construction is over and not have any regrets. Work activity can vary substantially and I may have visited on a slow day or there could be more/less noise or commotion during different phases of construction".