Most content creators are currently or have significantly reduced their playtime -- is this expansion format not working?

As of current, I know many content creators that have already almost completely checked out or at least looking outward for content during this expansion cycle:

Darens, MightyTeapot, Sneb (and some other more minor creators) --> OnlyFangs (A WOW focused group)

CaffeinatedDad, WoodenPotatoes, Mukluk --> Either fully quit or significantly reduced playtime (ie. Mukluk only once a week) due to loss of interest, burnout, not enough content.

Is it time to have a talk about this expansion format? Is it not providing enough for players? Or is this just the natural lifetime of GW2? It seems like the only true content creator still going full speed is Laranity but I've seen her interested in playing WOW as well.