They did. I thought it was a good move. If you care more for the WDC than WCC (which RBR, who are in it for the publicity more than the prize money, surely do) then it made sense.
I expected to absolutely hate the FL point but actually quite like it. Adds a bit of interest to races at the point where everything would otherwise be over.
Adds no interest for me. It's not like they even show tha lap being driven. If it is to remain then open it up to all drivers, not just those in the top 10.