Why exactly should they refund Endwalker..? Nothing in the expansion is subpar, horrible or broken. In fact it's absolutely sublime.
Game time being eaten up by queue issues, that's potentially a 'subscription refund' for those who may have decided that they do not wish to play right now, but definitely not the expansion. After all, the expansion isn't running away or expiring, it'll still be there even when the queue issues have resolved themselves.
So no, they don't have to go ahead and start handing out refunds for Endwalker, beyond normal procedures they have for it anyway.
Also.. try to keep up with the news, as far as I know they're doing work today to try and resolve the 3001.. they announced that here:
https://na.finalfantasyxiv.com/lodes...9666c6bb5cc202
So yeah, not entirely sure what you're asking for as they're pretty much constantly communicating what issues are still in play and the continuous efforts they're making to resolve them.