Allrighty, I just did Vanaar, great map and great visuals. Gameplay flow was great and the game does a great job easing yourself in it. I had, however, some framedrops (down from 60 to 20-25) while placing structures in the mid-late to late game on the following machine:

Republic of Gamers Laptop 751 Series

VRAM 3GB DDR5 Geforce 970M

16GB RAM

4x2,5Ghz I7 (turbo to 3.5)

I hope this helps :) Keep it up, folks, game's great, I will be giving you more feed back as I play.

I get the same issue with a big city, their code for calculating the areas to highlight when placing certain buildings needs to be optimised massively, or moved to another thread and rendered when the results are available.