But if I was out in the world pugging people? I would think myself a jackass to expect people to have 540-550 ilvl to do content that drops 540 gear. I'd probably bottom out around 515-520 ilvl because that's actually reasonable to clear the content without being a complete carry. The reason LFR and flex exists is to allow casual players to see the content. I wouldn't expect the bracket of players flex is aimed at to have a 550 ilvl.
See *maybe* there's a couple groups that fit into that group 1 and are pugging for the "smooth run" but the problem is A LOT of mediocre players start adopting that philosophy and turn it into a standard and then it gets ruined for the audience the actual difficulty is aimed at.