I don't claim to be a constitutional expert, but given the circumstances, wouldn't a decision to prorogue Parliament equate to an admission that the government can't function? Could you not put forth the argument, that the country is in the midst of crisis, and the governing Conservatives have ceded their authority, by paralyzing the legislature, Canada effectively twisting in the breeze? Would we not see mounting public pressure, the government forced to hide, rather than face the will of our elected body? I don't see how a prorogue at this moment can realistically fly, if anything it will further the momentum to topple the government.
The Governor General does have responsibility to ensure we have a government in place, if the Conservatives voluntarily cede their responsibility, then why can't the opposition visit the GG, argue that the government is AWOL, they have a working coalition in place, that can move the country forward? A prorogue now, equates to an attempt to usurp the democratic will, more than procedurial wranglings, it creates a fundamental crisis of leadership, and one has to wonder if the limbo can be tolerated, given the circumstances? That action creates a vacuum, which seems to admit the government can't function, it has failed.
A few procedural games, the government can surely employ, but to actually prorogue a new parliament, with the only motivation to protect Conservative fortunes, state of the nation be damned, doesn't cut it and if the opposition keeps up the pressure, it could turn out to be the last act for the government. Prorogue amounts to an admission that the government has lost the confidence of the House, in essence Canada doesn't have a functioning government. Can the GG step in under these circumstances?