Accepted.
I think almost all of your points can be resolved by rectifying two misconceptions.
Consequently, the rules of which type of Siman are effective at removing the Issur of Milchig bread are not relevant to determining how to avoid Ein Mevatlin. While the photo you linked illustrates that Goyim may eat meat with English muffins, the OU-D designation will preempt this with frum Jews. Numerous Poskim in Siman 87 as well as in 89 mention ?”? ????? ?? ???. If you wish to propose otherwise, the burden of proof is on your shoulders.