A bug/feature that I think needs to be fixed are the trees in the snow-covered regions of the map. They glow "hot" in thermal vision, when they should be cold and dark. The trees in the lower regions of the same map do not have this problem.
It's frustrating trying to target ECM mechs shooting from there when none of the vision types are effective.
To a lesser extent this is a problem for the ground in the cold areas as well. Those areas glow brighter than the warmer areas below.