i'm not convinced people really care much about this, given the other options.
but, there is going to come a time when the data comes in, and to suggest that the discussion is out of bounds is disingenuous. nor, would this be precedent setting, as it is exactly what happened to chretien, to mulroney and to the elder trudeau, as well - all were replaced due to fears that they would lose the next election.
likewise, there's all kinds of precedent for turfing rowdy ministers from caucus. these women are clearly acting maliciously, and the pmo appears to be too stupid to figure it out.
what i might rather point to is the question of whether the tactic of replacing a pm to save the election was ever actually successful.
john turner got completely destroyed by brian mulroney. while the elder trudeau was clearly in trouble, it's hard to argue that john turner saved any seats - and easy to point out that he no doubt lose a lot of them in quebec.
a few years later, kim campbell got completely ripped apart by jean chretien. there were other factors at play, certainly, but going from a majority to two seats is hardly an inspiring example.
likewise, it's hard to argue that martin saved the government. chretien won huge majorities, and martin eventually lost to harper.
do i think trudeau should go? the lavalin issue aside, which i think is a triviality, i am uncomfortable in the direction he's taken the party and would like to see somebody more representative of the trudeau-chretien years take over and steer it back. i don't care about their gender or background; kathleen wynne would be a good choice. but, i'd like to see a convention and a proper process, not a resignation and ad-hoc replacement.
and, if the bigwigs think going into an election with an unelected pm is a good idea, i'd just remind them of what happened the last three times a party tried that. it's not a good tactic; that's not going to work.
https://www.theglobeandmail.com/opinion/article-should-justin-trudeau-resign-thats-not-up-to-you-to-decide/