LUL – You do have the more difficult task. I agree that there are two different shittos, one saying Da’as Yehudis is at minimum what it was at the time of Chazal, the other holding it depends on the time and place. You are saying there is only one shittah.
As long as there are valid shittos that say Da’as Yehudis depends on the time and place (for example, the Iggors Moshe in Even HaEzer, or the Diveri Chamudos semi-quoted earlier by DaasYochid), the room for leniency exists (whether I personally use it or not). That creates a Limmed Zechus on many Jews from both this generation and prior generations (which both of us should view as positive). Whether you or I would Pasken like that, and go out with elbows uncovered (or Ittisa), is irrelevant.