“simple” thing is in fact difficult to do well.
I also agree that having a date disc which matches the dial color is essential. Your Zenith is a good example of that: even though I find the placement at 4:30 not ideal at all (like on my Alpine Eagle), it kind of works.
Also I find funny that Zenith chose to orient the numerals perpendicular to the bezel, while Chopard chose the parallel orientation.
Best, Emmanuel