Don't mind me too much...I tend to be pretty old school when it comes to Flash animation. The new animations are far better. THe imges seem to flow more naturally now.
Actually, prompted by your observation, I asked colleagues to compare the old white with the new neutral transition, and they used the same word "jarring" for the one with white. I think there must be a physiological basis that makes images easier to process if the intervening fade is neutral and subdued. One person said he thought I had made the colors on the images richer, when in fact no changes to the images were made.
What PP technique(s) did you use. Your colors have a subtle beauty.
For the Pomfret images I think mostly it is a consequence if the pre-dawn light and the that the fields were covered with a heavy frost. Anyhow, these images among my first attempts using Lightroom, having had a lot of experience with RawShooter Professional user. In particular the targeted adjustment tool helps to isolate luminosity color adjustments, and so encourages trial and error.
For the bridge images, it was a preternaturally foggy day in the middle of Winter. I used Lightroom for the B &W conversion (since I felt what color there was distracted from the fog) and its parametric curve to try to bring out the distant new bridge from the fog, again just fiddling to get things to look as good as possible.
By the way, apropos B & W with Lightroom, see
here on the O'Reilly blog.