Playing the game after expansion feels... not bad, but perpetually empty. If you're not part of the rush to get things done, you'll never have a chance to do it; Places like the moon and occult crescent are becoming ghost towns. Previous areas of those nature already are, but doing anything in them requires a massive amount of people.
You (the developers) need to make plans for when this content isn't new.
Along those lines, stop making fifteen different end-of-expansion islands. There is no reason why the moon and occult crescent couldn't be the same island and having an integrated story. All this separation does is splinter the people playing into tiny subsets instead of being immersed in a world with people.
It's not hard to fix, but the people making this game need to burn the instruction manual they follow every expansion (and post expansion)
Thank you for coming to my rant.