Best of luck to you and your following.
The serious (and expensive) issues you name specifically tend to be the one's I keep seeing and reading about with many experiences happening under 50 or 60 k miles.
I see a fair amount of posts here defending Mazda when others have unresolved issues with Mazda "not going to bat" when someone is even slightly over the warranty period or miles yet they are the very same issues. These would seem to be known problems happening often enough to be unnerving.
I can only hope that my 08 with 74k + is an exception and if I have issues, my ext warranty will catch anything big costing me a minor deductable.
The numbers of people who claim all dealer services, LOF and maint records (documented) then have VVT - sludge/egr and/or other major design-related meltdowns, yet are left hanging is difficult to imagine.