I'm usually very critical of how people word criticism on here because it's usually pretty garbage 9/10 times, but this is really good. I agree with some of it. World building is something that for me, peaked in Pandaria. I was hyped for WoD until the Draenei got absolutely shafted after Shadowmoon, and we learned practically nothing about them. Legion had terrible world building except Suramar which was amazing, and BFA had very good world building for the Zandalari and middling for Kul Tiras. Then Shadowlands was just a disaster. What strikes me so well with Zandalar and Kul Tiras is that both cultures feel distinct on Azeroth. Zandalar gives that glorious Continental African SuperKingdom vibes and Kul Tiras' take on Druidism and Shaman is incredibly refreshing.
Dragonflight kinda loses a lot of this. Ohnaran plains has a bit, the Maruuk are cool and all, same with the Tuskaar of Azure Span, but imo it's not enough. It also doesn't feel like, as you pointed out, connected. They feel like separate landmasses, not just different regions.