DaasYochid:
“We also say zikaron l’maaseh v’reishis at night”: I Don’t understand your question. “Zikaron” – just tells us why we have Shabbos and it is because HKB”H rested on Shabbos.It doesn”t talk about the creation. Vehamevin yuvin.
“besides the fact that kiddush in the day is …… and the “nusach” you speak of is not me’ikar hadin”. Even though it isn”t meikar hadin, it is said as a minhag for a reason.
“A cute pshetl is not a reason to do something which is questionable l’halacha.” It isn’t questionable lehalocho, and there are many that were noheg so – and it is not DAASYOCHID.