I think I've only seen one post where someone was in favor of keeping the cap at 50.

That isn't what most of us are asking for I think. We just want them to decide on a cap, get us to the cap in a timely manner, and then gear the rest of the endgame content around challenges that will still be challenges 3 expansions down the road.

In a game like WoW, or Lotro, where one character is locked into one class, the only way for them to add new content is to raise the level cap.

The dynamic of the game is you hit the level cap, and then you grind raids for your gear set. Once you have the set You can maybe continue grinding for those impossibly rare weapons and accessories but that's it. They can't really add new raids with different sets. so they raise the level cap, give you higher level raids with higher level sets for you to grind.

The dynamic for a game like FFXI is once you hit the level cap, your linear progression stops and now your character grows outwardly, you level new jobs, you get better gear, some of that gear might inspire you to level a different job, you need to level more subjobs to round out the jobs you have, you gather key items that are beneficial at various stages of growth.