A magnetic pole shift has nothing to do with movement of surface landmasses.
I disagree. The poles are a direct result of the spin of the iron/nickel core of our planet. Were this spinning mass to suddenly flip, the resulting resonance wave would cause a tidal shift of the magma surrounding it and cause a tidal bore that would then affect the plates on which we sit.
This would result in many a coffee cup being spilled.
We don't know that for sure, and it certainly doesn't mean a shift in landmass couldn't accompany a magnetic pole shift. There are many dynamic forces in play we don't even begin to understand.
A magnetic pole shift isn’t believed to be an extinction level event. Disruptive but not a civilization ender.
Perhaps many polar bears now living up in the artic along with the extra ice will cause the planet to capsize?