I don't like switching to daylight saving and back but I'd rather have that that permanently moving to +1. Then you have extreme examples which are already shifted like Spain (for historical reasons around aligning with Germany) and I don't find that alignment useful economically, in city life practice and more.

If had to make an executive choice with no further analysis at this moment I'd put them all in their respective original times and move Spain and any outlier to their proper timezone (a vertical map alignment of sorts)