For such a small map, tremendous fun. Antarctica bonus is only attainable given some very flukey starting positions, and I think linking the four Antarctica territories and the two Greenland territories would make it a bit more strategicaly challenging. It's great one v one as well as against three AIs.
I would not change a thing geographically - I like the Antarctica and Greenland are chopped into separate bits. I do like the recommendation made to create a distribution mode that prevents players from starting in Antarctica, however.