We all love redwoods. Except people that don't like trees, but that's something else. I live in California and have seen Redwoods up close, and the mod version is very similar. However, one minor detail is missing. Redwoods don't burn.
In real life, Redwood trees got to be as massive as they are from their tough bark, which withstands fire. The fire is their friend, it burns shrubs and weeds on the ground, giving them more nutrients. I believe that redwoods in the mod should not burn from regular fire (Khamul's fire is another matter...), or at least have a higher resistance to fire.
(Of course, in real life, the young trees are not as resistant, but that's hardly doable in the mod to make only the large trees not burnable)