david:
I see, so you are talking about an eruv that uses enough mechitzos that it is considered not a rshus harabim. Hardly the case in most cities.
Also, I am unfamiliar with your reference to knowing about more rishonim now, but;
A. I heard this from a well regarded NY posek.
B. We generally don’t rely as much on rishonim which were newly discovered and were not known to the acharonim.
C. Your link does not work.
D. Your bickering about “kulas” is simply semantics.