The Redeemed Citadel event continues, and both the second and third milestones have come and gone. After how much grinding I did during the first one, my motivation has dropped off sharply. Me and all my guildies have bought the Zen market item to unlock the event permanently, so there's no rush to complete it in time - and since you gain credit for gaining Zariel's favour towards multiple milestones at once, the "optimal" thing in terms of effort vs. reward at this point is to wait for the fourth milestone to begin and then work on progressing them all in one go.
That said, I think we're also getting a bit tired of the Avernus Wastes in general. Usually we'd only spend a month or two in a new module, but due to this event we've been grinding mobs on the same map for more than four months now. At this point we only tend to meet up once a week to do a couple of the weekly dungeons but by now even that is getting quite tiresome to be honest.