I have been calling daily because of the 2 WL limit. I decided just last month to try to switch 2 of my 7 nights to BLT. It is opening week and I doubt the WL will come through but I do call to see if I can luck into a room.
A few times, they even put me on hold thinking they might be able to get me the view I am not WL'd for. I even joked with MS about my daily calls and they said it is not a problem since availability changes so much.
Typically, I will book at 11 months, what I want and hopefully, won't be in this situation of WL'ing too often.