The Poly is also more expensive, so if you can afford it and it fits in your budget it might be the better option.
But Poly is separate buildings, so check-in and restaurants are not connected to the room buildings. WL is one big building so you are indoors more, so less worry about aircon.
In terms of facilites the beach is closed at WL and no boat rentals either. We don't know when the new smaller pool will be finished but that might be open by late 2017. In fact by fall 2017 I would expect 90% of construction to be complete.