Story is the big thing. There's going to be a reset and tonal shift. Also new lore and new encounters. As much as some people get super deep into the mechanical differences of things, other people just love running Aglaia because "it's fun". Also getting some lore on new areas and peoples.

A lot of your list is also subjective. For example, many people don't feel class design is "horrible", there's OBjectively not "less content than ever" (HW had less; handwaves can be made about "the game was still getting its feet" or whatever, but it's a fact), how "stale" raid mechanics are, how "weak" content and story are, etc. Most of those things in your list are subjective. This doesn't mean they aren't important - fun itself is a subjective concept - but it does mean that a lot of people are looking forward to DT due to those things, and others in spite of those things.

I think it mainly depends on the person.

I'm looking forward to seeing where the story goes, I genuinely like and enjoy playing the game, and I like the sort of soft-resets of content every time there's a new level cap and new areas and systems to work out, etc.

DT as a sorta ShB 3.0 (EW was ShB 2.0) is fairly realistic, though I'm thinking they've heard player complaints about things like the lack of a Eureka/Bozja and will likely give us one of those. So I feel my hopes are pretty realistic, yes.