Here is a quick "unlisted" video I made with Time Preview ... I think I understand the confusion ... time preview does work:
I tends to work better if you start at night and then progress to day (as the night lights get "drowned out" during day hours). When you start from day and go to night it's more obvious because the night light textures don't swap in.
But this is ONLY for time preview, the textures swap is fine when actually changing time.
What I do miss from ALL Virtuali scenery is that NONE of it shows up in Instant Replay, makes is more difficult to show off this wonderful handy work (sorry, I find FSRecorder just too flakey and slow in P3D).
Cheers, Rob.