Itche, put it this way. The Chasam Sofer’s main complaint was that you have to Daven with the Shaar of your Shevet, and that Ashkenazim have one Shaar. The Rokeach mentioned above is also in the same vein.
The Chasam Sofer said that the Arizal Davened Sfard because he was a Sfardi. The Divrei Chayim and Minchas Elazar argued strongly about this, proving that the Arizal was in fact Ashkenazi — just like his cousins, the Maharshal and REb Eliyahu Baal Shem. Also, his Nusach was closer to Nusach Ashkenaz than to Nusach Sfard.
If your problem is getting the Teffila answered due to its corelation to the holy realms, than the Arizal is the one to depend on, unless you go with the Chasam Sofer that the Arizal merely followed his Mesora. It is taken for granted that the Arizal’s grasp in Kabbala was greater than anyone before him, dating back to the Geonim.
I wonder if the Chasam Sofer would have been against the change had he not been in a time where there were many changes going the other way.