It is… its a filler expansion lol.
On the same level as Shadowlands- except I guess Shadowlands annoyed me more since it ruined the Lore. But at least Shadowlands felt somewhat original.
This feels like a generic/lazy expansion.
And Karesh is copy/paste Netherstorm with “PHASE DIVING” (lol 
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My question is who thought we should go from dragons and the emerald dream to boring dwarves with no emotion?
It feels like the maw but with ethereals and less content.
A lot of good points here, so I’ll keep my observations short, but it does feel like Ka’resh and the Haranir zones were swapped between xpacs and that Ka’resh was rushed out so more of the team could focus on Legion Remix. I have hope for Midnight to be a more cohesive story than TWW. But I’ve been wrong before.
IMO, it’s deliberately undercooked because they wanted players to be finished with it before LeMix. It’s not like Undermine was overflowing with content either though, unless you count being double rep gated and starved for Miscellaneous Mechanica as “content.”