AAQ: It isn’t Chasidish Nusach as the Arizal, who formulated the Nusach, wasn’t Chasidish.
It is interesting that you refer to the Arizal as an unsupported innovater, nevertheless the Arizal is universally accepted across the Jewish spectrum as valid.
The Chasam Sofer did not innovate Daas Torah. Daas Torah is another expression of Emunas Chachamim. And, presumably, you know the source for Emunas Chachamim.