It's not dying, but it definitely needs to do something different to keep players interested. 2.4 unfortunately sounds like it will be another 2.2 (Second Coil will be unlocked, we get three new dungeons that will most likely be redundant on release, Myth tomes disappear to be replaced by Soldiery and a new tome, new EX Primals, probably new Hildibrand Trial, etc).

What would be nice is if we actually had hard Light Party dungeons that drop gear that can be used for Coil (or a super secret new raid that will only have a loot lockout, allowing people who can't join their friends/LS/FC for Final Coil to do that raid instead. Difficulty will be above Second Coil, but below Final Coil).