My last replies have been wordy so I feel people have missed the main point: I am advocating for something LIKE LFG available as an alternative that will allow players automated cross-realm matchmaking with like-minded people who do not want to share instances with Go-Go-Go players. Why should the automated matchmaking be the exclusive privilege of one play style? This will not replace current LFG.
I wrote up an example and put it in a new thread.