From an email I received yesterday evening from Matt Certosimo, the National Membership Secretary:
deadline extension will give the party time to contact anyone who is serious about following-up on their original contact, although I expect the final tally will be embarrassingly low. That said, if Joyce Murray hangs tough for the next couple of weeks this could still be an interesting race. She can't win, but her message of LPoC/NDP cooperation is resonating in some quarters, and I'd be curious to see if she can move the field, or what is left of it, in her direction a bit. I sincerely hope the T.O. showcase isn't cancelled. I was told there would be food.
As for Coyne's column this morning, ignore it. He's been rehearsing bits of it on twitter since last week; the honest outrage it expresses is all fake.