So let's review the facts one more time: Mulcair leads a party at the top of the polls (not even in government so it doesn't have any tough baggage to have to carry) which craters into third place, and there's how many threads and posts over the issue of whether or not Mulcair should go? Why is there even a debate about this?
At least the Liberals and Conservatives know how to win and are willing to get the job done. If this is what passes for the NDP, perhaps the party isn't worth anyone's time any more, and it's best to either vote Liberal or build up an alternative.