World first race was well underway and progressing before LFR was even released. Perhaps some still did LFR, but I suppose that's the point of obsessive compulsive world first races.
I've never understood why the world first thing is seen as such a big deal. It's essentially a question of how much content can you skip, ignore, and how many hours can you pump into a game just to complete a task and have nothing new for months. I just don't get the appeal.
I think it's no surprise that an unhealthy amount of playing is going to lead to burn out. And, don't forget, these raid groups that have been in the world first race since Cata, Wrath....BC...are almost 10 years older now. Life doesn't allow you as much free time year after year.
---------- Post added 2013-05-01 at 01:37 PM ----------
10 man raiding is considered "the hardcore" of the two in Korea but 25 man is the harder "more hardcore" in the west. Interesting, no?
But I do agree. I actually liked the 10/25 having different graphical gear rather than just stat differences.