The addition of date and quick-set functions have vastly improved day to day wearing practicality of the watch. The ability to adjust the hours independently in 1 hour increments should also come quite handy when travelling. The movement as well is improved, and I think that beyond doubling the power reserve, Lange would have made other changes resulting in greater reliability and durability. I can imagine Zeitwerk Date being a very strong proposition in luxury-casual category, especially if Lange ever decides to offer it in steel or titanium.