Everything only doable at level cap... of which there is 25 level caps per character. 26 if you include Blue Mage... of which I'm not, but there is a whole chunk of Endgame BLU content that requires it to be 50.
Yet a lot of the sentiment here... "I'm only playing 4% of my character, but the amount of content for 4% of a character is too little, make more content of 4% of my character and sacrifice part of the other 96% of all characters content to do it."
As of the current the only content based things that we're reduced or moved to other content was, the casual expert dungeon count dropping by one, to make experimental content, which should have things like diadem, eureka, and Baldesion Arsenal in there (tho I believe some of the resources for Ultimate 3 were moved to BA as well, but Ultimate 3 was dropped for a different reason, next sentence). And last cycles Ultimate count dropping by one due to them being of the understanding that players felt burnt out of the first one, and by the time of the 2nd they got the hang of it, but the content for the 3rd was already pulled from the production plan.
Want 4 or 5 Raid tiers an expansion, sacrifice your Ultimates for it, might be possible. I think it's a dumb idea, even if I don't partake of either content when it's current. Even if it would technically result in more over-all content, still think you're better off with the ultimates.
Easiest way to cut out casual content would be to get the game down to 4 jobs tho, make balancing a lot easier... You can have a 2 Tank, 2 Healer, 4 DPS. Pick which of the 4 tanks stays (PLD most likely), which of the 3 healers (WHM most likely), which of the DPS (BLM or DRG or more likely both)... bam thousands of man hours and dollars pulled out of casual content that can be put into HC content, just every group has to play the exact same things.
Also there's plenty of casuals that don't play everything, and many accept that as their choice to not partake and they lose content due to THEIR OWN CHOICE. I accept that it is my choice that I don't do Extreme/Savage/Ultimate fights, them being cut for things I actually do is still wrong in my opinion. I think the PVP in this game is pretty bad, so I didn't do this piece of essentially endgame content, thus I never got any of the PVP seasonal rewards, doesn't mean I think it should be cut (do think PvP needs to seriously hire a person from elsewhere tho).
I have yet to figure out why they make content easier ever since Steps of Faith MSQ to get into HW... it was doable at launch... now its roflstomp of boredom and people still can't do it at it right.
It's been known for a long time that bleeding edge raiding can't support an MMO. It's why most MMOs only have a bit of it every expansion. Wouldn't be surprised if casual content was cut to make Ultimates, but alas nothing on that matter has been said explicitly so, that's speculation.
Even then, the pacing is nearly twice as fast here. To get HC or any content for that matter at a pace of the people who burned through all of their desired SHB content in 2 weeks, the man-hours and financial costs would probably require our subs to go up by a significant margin.
Heck without the loot lockout in place, for these types of content devourers, starting the expansion at the last patch before the new one would probably put em into a content drought a month out from the new expansion.