My two cents, as someone who likes the higher tier content and has thought about this a lot:

The disparity in difficulty between most normal and top end content is just too great. I understand numbers count, especially with an MMO (especially an MMO under EAnix as they are now), but I do not believe normal content should be designed around people who don't even want to improve meaningfully at all. And yes, I know when it comes to roulettes, especially alliance, you have people who will avoid anything harder than labyrinth at all costs. The fact that they CAN is the problem. Too many people wanting to avoid even remotely engaging content is a consequence of a game that has made it too easy to avoid remotely engaging content at the cost of everyone else. And for the whole "There is ex/savage/ultimate" etc, let's be real for a second. Unless you have second job time to dedicate to an FC or a static you're not seeing that stuff. PF exists and it works sometimes but your only two options shouldn't be the extreme ends of "are you alive and pushing buttons" and "Second job".

Few of us, relatively speaking, want the challenge of top end content. But I would be willing to bet quite a few of us want something better than content designed around people who want to play the game as white noise. The bell curve is wildly inverted, and I think a big chunk of people in the middle are getting completely left out.