Speak for yourself. I only did Dungeons after LFD was implemented, I did looong Dungeon runs, waiting in the dungeons for tanks on bio-breaks, Healers with fussy kids … you name it. And we often stayed as a group and did the next, or another dungeon together.
Yes, some were from anther realm, but you could still stay together as a group and continue.
I do not recognize your description of how it was.
Maybe this is simply a PvP vs. PvE thing, as I always played on PvE servers or even RP-PvE
PS. I would like RDF to be in game - but not untlil later, and it’s decidedly not a gamebreaker for me like some of the other changes migth well show up to be.