I agree, I was really looking forward to this but it's been very disappointing so far.
It feels like the devs listened to the criticisms we had of Anemos and decided to take a 'corrupt a wish' approach.
We asked for dailies and solo/small group-friendly content - they gave us the Challenge Log which is weekly and best done with a full group.
We asked for something to do besides fates (treasure hunting was suggested), and we asked for exploration to be rewarded - they level-locked the Aetherytes (again), introduced the XP Penalty right from the start, but they did give us the 0 XP bunny fates, and the frankly pitiful rewards if RNG favours you and you get a bunny.
We said it was too slow opening all those lockboxes - now we get one per fate (after they'd already fixed the issue in Anemos)
We asked for a level-synch so we could help our friends - No attempt to give us this, more of a doubling down. Trying to chain mobs in a party where people aren't all at the same level means you don't gain as much xp (according to some reports I've seen, even a difference of one level has an effect), anything over 2 levels difference and you might as well forget it.
The nerf to the NM spawns is the worst.
I liked the fate-train; the best groups for me were the chatty ones; I met some great people in Anemos. If we had low-level players, ferrying the new people on the two seater mount and making sure they got rezzed and were left somewhere safe(ish) in the high level areas was fun, too. You don't get a lot of chances to help people out in this game or have much reason to talk to them, so the social aspect was very appealing. There was also enough down-time so you could goof around a bit, chat, or just give your hands a break.
Now, we grind huge amounts of mobs and the NMs spawn so infrequently that it feels really punishing. Grinding demons all night and not getting the NM is a complete waste of time, I've done it twice now and from what people are saying, the train is dead or at the very best on a complete go-slow.
I'm not sure how people with limited time (this is casual content after all) are supposed to progress fast enough to get their relic before it's outdated.