Barely anyone is playing the mode now. If queues were popping like popcorn and the leaderboards were filled with different individual characters, then yeah, I'd say the mode is thriving. But it's on life support now and the prognosis is grim.

By the same token, why should anyone run old primals again if they already have their mount? They do it because they want to help friends, maybe do WT, work toward their tank mount, etc. Feast isn't going to die if you let more people work toward a reward that's 3+ years old by now. The really, really hardcore PVPers will be chasing whatever the new thing is so that they can have it first (see also: Omega mounts - I don't think raiders care that eventually everyone will get that snake or airplane).

And regarding "exclusive', the Moogle costume was also marketed this way, yet it's up on Mog Station now. Is there anyone out there who attended the Fanfest who is losing their mind at a sprout with a brand new Moogle costume on that they bought from Mog Station? Anyone?