Whoa thats a lot of words, but MOSTLY pretty fair and accurate. The only thing i will mention, which is massive, is that you dont talk about MYTHIC raiding, which is what i was specifically talking about - hardest content compared to hardest content - like for like. The point i have tried to make numerous times is that the demands of mid range mythic raiding is substantially higher than heroic - its a HUGE leap in time required, and obviously in difficulty too.
Looking at the character you link in your sig, you do LFR a lot, and over the years have dabbled in normal, and even got a few bosses down in heroic. I see what i assume are mythic runs you have purchased (1 kill of each boss only), which is perfectly fine by me, no problem at all. But it does suggest you might not be experienced in mythic raiding, which would explain why you avoid the subject.
The hours mid-high end mythic raiders are putting in for weeks on end are causing people to quit - it has been a major issue for many guilds for quite some time now, 2 expansions to be specific. I do not see anything even close to that in classic - and so far, all the farming that people suggested would be mandatory has proven to not be required at all, and i think that pattern will continue - Certain fanbois scream and yell that the NEXT tier will crush everyone, and when it falls over day one and is being pugged within the first week, they will say "nonono, no one EVER said THIS tier was tough, its the NEXT raid that will destroy everyone!"
Until eventually, Naxx falls over like it absolutely will, and pugs will be clearing it within a week, and the same people will scream "no one EVER said vanilla raiding was hard, you just wait for BC though!"