Wow. The Baffin/Hudson/Labrador/Arctic ocean will be awesome. :-D But you're in for some serious long-term Arctic glaciation there, especially considering that you're busting up the thermohaline circulation pretty seriously. I assume you worked all this out though.

Surely the Antarctic will even out? It's really lacy there, which I suspect is an effect of using current sea level values; maybe once you apply glaciation it'll look more reasonable.

Have you looked into "inertial interchange true polar wander" as a mechanism? It didn't really happen, probably, but it could! Not sure why it might wipe anyone out though, but I'm sure you could come up with something...