Am I the only one who dislikes the people in LFR rather than the actual concept, poorly executed as it is? I mean, I do it as an absolute last resort for fragments, and I can't imagine what a mess it would be with just people it's meant for (ie people 480-502 who don't actually raid) but it's here to stay.
If you take the originally stated aims of making content accessible and apply that back, then it would probably have been one of the "super-elite" raids like Sunwell that would have had the treatment, though just imagining the mess 25 random people could make of most of those mechanics is more my reasoning for that one