At this point the major construction sounds like it might be finished. However, the east pool is still to come and is a fairly extensive undertaking, IMO. Also, there is the uncertainty of 'other work' to possibly be started over the next few months. We know little about this and even less about the potential impact that such work might have upon a resort stay at the Poly. You either have to be willing to accept whatever construction happens, or be willing to stay somewhere else and potentially be disappointed to learn that it would have been OK to stay at the Poly.
the uncertainty worries me, so I just avoid the Poly for the time being. We still visit the Poly for a meal and a walk around each trip. I have been waiting since early 2013 (6 trips now), hoping to stay at the Poly each time. We are now hoping to book a stay in January, but we are waiting to see what the situation is when we go in Nov before we book. After the most recent changes in how