Lange has made thicker watches, such as the Tourbograph and the Lange 31, which are similarly uncomfortable. The ZW Striking Time (at 13.1mm) is probably my limit for thickness.
I like it much more than the Datograph Up/Down Lumen. I typically don't like watches with dials that are this "busy," and the moonphase disc is annoyingly small. Those things bothered me in the "normal" Dato PC Tourbillon but not on this version. I would feel better about the pink dial version if on
SO much nicer in person than in the photos! Usually when wearing the watch on the right, I don't want to trade for whatever else is in front of me. But in this case, I'd make an exception!
I find the older movement to be aesthetically more attractive, and the preload never bothered me. As you observed, the preload is barely perceptible. Couldn't really go wrong with either one, and getting it from your preferred dealer is an added bonus!