The similarity of Dragonflight to WotLK should be more apparent to everyone. They might as well said "You want WotLK so bad we'll emulate WotLK" Wrath didn't have any newfangled game modes & it was the last time there were crafted BIS items. Plus if you told me they've been planning an old world revamp since BFA but because of covid they decided to through this filler expansion together to buy themselves two more years to work on that.
But I wouldn't say it's pessimism: I'm looking forward to Dragonflight, mainly because it can't possibly have less content than Shadowlands