I agree, I love the new variety of trees and materials. And yeah, I pretty much recognize every tree and rarely mistake them too.
But I agree that some 'colors' are missing; although witherwood added a much needed "gray", it is only blocks and we're still lacking a true gray or white board/inner wood. The close we can get is spruce or poplar, but both of them have a slight tint of brighter colors (yellow/cream and green, respectively)
And yes, I agree with blues and such. We do have an abundancy of reddish woods now, I'd like to see some love to other hues. Not necessarily asking for unrealistic rainbow colors, but at least more varied tones.

And make Willow Trees great again!