The issue with the current time zones in Europe is that they are far from being natural… The more you go to the west the later the sun is raising and setting, the more you go to the east, the opposite. Current western European time zone is too large… There are initiatives to improve that but will it be done ?

For example: https://timeuse.barcelona/what-we-do/permanent-time-zones-eu/

As expected, matches the tectonic plates map.