Tangentially, I am curious about the implication of other tribe geographically based weaknesses (dry/wet lung) as far as limitation of tribes playing outside their home biome.

I would appreciate if we could get an idea of just how crippling these biome restrictions will be -- are we talking about minimal debuffs that can be overcome with training / nutrition / alchemy? Or are we talking about polar bears trying to make it in the Mohave?