As you can tell by the screenshot below, I random mapped into a game that started in the center of a huge area of arctic terrain.  I think this is awesome, but there are some issues that I would like to discuss.

1) My scouts were not able to use their Scout ability (no movement penalty in certain terrain types) in arctic forests.  I'm not sure if this is a design feature or a bug, but it seems to weaken the scout a good deal, escpecially when arctic terrain covers a good portion of the map.  It should be made clear in the Scout ability's description that arctic forests are not included if this effect is indeed intended.

2) I'm loving the 'enhanced' biomes that Sorcerer King is introducing, but I would love to see more natural denizen lairs within each biome.  It seems that early in the game the SK's units are too ubiquitous and the wildlife diversity is extremely lacking.  That's not to say the SK SHOULDN'T have units/lairs all over, maybe just a bit more sparse, with more local flavor mixed in.  So for instance I would like to see creatures such as Ice Shrills, Polar Bears, Arctic Wolves, 'Icy' Spiders, Ice Mages or Witches, more Garottes/Yeti, Ice Drakes, Ice Elementals, etc.  On a tangential note, I also wouldn't object to seeing monster lairs grow stronger with expanding ZoC's if they are not cleared in a timely manner. 

3)I also find it clumsy that there are beach-like coastlines adjacent to arctic terrain.  How about a gray and rocky coastline with crashing waves and seagulls, and crows or ravens inland.

4)Regarding the Artcic terrain, I would also like to point out that in Tactical Battles, it can be very hard/impossible to see the move/action-grid. For example the strike-3-adjacent enemies, it is impossible to see the targeted tiles. [thimon2k]