Changing default for DisplayMode from 1 to 0. Users are getting confused by the display doing something they did not ask for (and not being aware of DisplayMode). This got worse with LVGL/HASPmota displays becoming common, with users having much less reason to dive into the old DisplayXxxxx commands. And it may even be hard to see that it is even a display of time/date causing the display to flicker.
Changing default for DisplayDimmer from 10% to 50%. The low brightness of 10% is not always easy to see, especially in daylight. 50% is generally better, while not going "full blast" with 100%.