FFXI needs some more new content then just delve
Pretty much what FFXI has turned into is just do a bunch of delve for plasm because almost everything else is pretty obsolete. There are a couple of relevant pieces in NNI and Salvage 2 but almost everyone finished those ages ago.
Delve obsoleted most end game events.
I would suggest coming out with some new end game events soon because the game has gotten really stale with just farm delve over and over. I know several who quit because it just became a boring plasm grind.
People want to do a varity of things in the game not just 1 event.
The amount of delve you have to do for airlixers to upgrade gear is quite a lot. Once you upgrade that gear what is it good for more delve faster? A lot of people start to think whats the point.