I also have 3 lvl 80’s. And I have not experienced those things. It’s not that I haven’t encountered ANY bugs, but nothing that ‘broke the game’ or ‘made it unplayable’. The worst thing I encountered was falling through the world. I had to use the ‘unstuck’ service. But that in itself was easily solved.
I don’t know why people have such a different experience.
This is an ancient bug, it’s just for some reason happening a lot more in TWW. That said, you don’t have to fly away or reload, you just walk out of melee range of the NPC and press escape and then walk back in, it’s like you’re stuck in a dialogue menu but it’s invisible.
I’ve only had 1 quest where a mob didn’t spawn. I abandoned and picked it back up and it spawned. I can think of many expansions that were simply unplayable for days on release. This isn’t one of them. Besides the auction house issues. The other bug I’ve come across is the current crafting bug where you need to click for each craft rather than it crafting multiple times automatically. The big with not being able to interact with NPC’s can be easily fixed by walking away from them for a few seconds and going back. No issues with delves. I’ve seen some cutscenes not be voice acted when they should and the spelling and grammar in lots of texts are bad but other than that. It’s been pretty smooth.
Personally this has been the smoothed launch ever. The only bug i encountered (and it happened a few times) is handing in a quest to an npc and not being able to accept the next quest or interact with the npc until i move away from it a bit and come back. Not exactly game breaking.
If you’re talking about quest objectives not spawning (if you’re talking about stuff to kill) could of just been that people killed them and they haven’t respawned yet. They could of definitely upped the spawn timers for the first few weeks for some quest mobs.