Re: that last question, do you mean, for example, the COVID-19 pandemic? I grant there is merit to some of the other concerns you raised, particularly the part about retaining IP and fostering its development here.
I disagree with, "...our healthcare is legitimately starting to fail". In fact, I'd say the worst has passed. We're doing all sorts of things to increase access to care. Of course, people are hurting right now and no amount of improvement will be quick enough to spare every single person who needs care right now, sadly, but improvements are being made.
Every province except P.E.I. has enacted a Practice-Ready Assessment (PRA) program to complete a clinical workplace-based assessment. That only takes 12 weeks. It's for foreign doctors and med school graduates. P.E.I.'s medical school takes in its first class of students in August, though, at least, but that will take a while to bear fruit and the lack of a PRA here annoys me a lot. We have a massive doctor shortage here. So, looking at this in the context of politics, I think the greater share of the blame for our situation lies with the provincial government, not the current federal government.
I'll tell you one thing that won't help shore up the medical system in this country: the tax cuts promised by little PP if he wins the election. So, as if I needed another reason to not vote for him, he stepped right up and gave me one.
As for the thread topic, without a long list of pros and a very short list of cons, I wouldn't support seeking EU membership, as I stated earlier. But strengthening ties to lower our exposure to mercurial fuckery by the US is never going to be a bad thing.
As for negotiating better trade deals, that's definitely not the motivatation for the tariffs. Trump himself (taking credit for) negotiating what he called the best trade deal ever (paraphrasing) puts paid to that silly notion.