I have the still-in-package neck straps for all my cameras. I don’t mind the Canon ones, I just don’t like neck straps and avoid them if at all possible. In the event that I want to use one, I certainly don’t want it threaded through the lugs. Instead, I connect a Blackrapid strap with the QD connector to the body or lens foot, depending on the lens.
I do have the Canon E1 hand strap threaded through the right-side lug on my R1 (with the bottom attached to the lug on the RRS base plate).