So in order to preserve a small minority who have somehow carved out a working system (which I'll assume exist despite never seeing them) in the overwhelming onslaught of vitriol and crap, we just have to deal with said vitriol and crap continue as is?

This also assumes that Google+ comments will kill off these high quality comment channels. I am sure it is true for some, but it is hardly the absolute death knell for quality conversation to require a Google+ account.