Please don't ignore casual content
I quit another MMORPG because all they ever did was add more endgame content, after a while I got sick of doing it and just stopped playing.
FFXI has a lot of legacy casual content but you need to update it now and then, there is no reason you can't update monstrosity, mog gardens, gardening, adventuring fellow, fishing, etc
If you don't do this you're going to lose a lot of players, not only casual players but also hardcore players that do casual stuff as the "spice on the meal"
Updating the casual content doesn't require mass amounts of work, please keep this in mind.