Any new details on how cities/mission hubs will work?

So far we know about the Nexus. It's almost as big as the Citadel, and someone said the bar Avina talked about ( I can't remember its name and I have no time to view again that video) will not be the only one.

I can't remember who said that; it got lost in all the chaos this marketing campaign is. They tease us with tidbits here and there, without telling us anything useful. But we can see the Nexus is really big. The Hyperion, compared with it, seems an insect. We may safely assume that there will be room for bars, shops and other places in the Nexus. Well, whenever I find who said that bar won't be the only one I'll tell you.

Haven't we already seen in the gameplay trailer Sara travelling around a port area to meet Sloane Kelly? That looked like your typical 'hub world' to me, especially as if I recall correctly there were a lot of icons appearing on the nav at that stage.

Totally agree. 

KoTOR is a great reference. Every planet had its own hub and from there you could do the main missions but also had a number of side quests. Often they overlapped which made them both better. Not to mention some elements like the races connected them all. It's a good example of how a minigame can actually make the universe feel more cohesive.

Assuming Andromeda will have many more planets and many of them will not be related to the main quest, you don't need hub in all of them, but in a good number. Also, there should be CITIES. Not only small ports and the likes. You don't need to explore the entire city like TW3, Assassin's Creed or GTA, it can be like Illium. (as long as it not as poorly excecuted as Val Royeaux)

Lifeless, static NPCs that are immovable and dialogue that overlaps the subtitles and no random NPCs you can have investigative conversations with in a cutscene. It'll feel detached as in ME3 and DA:I.

Probably just typical BioWare where they market a returning feature as if it's a new idea.

And yeah, I think they meant that the characters will ocassionally be in different locations based on variables like in ME3 and they won't actually move around using pathfinding or AI algorithms like good NPCs should. That's the thing with hubs in BioWare games. They don't use real AI programming for NPCs. They just make very simple pathfinding or even just movement patterns and then the rest of the NPCs are bolted into the ground and completely uninteractible.

They use hard-coding too much. No wonder their games suck up all RAM.

It's felt archaic since ME3 in my opinion. If you don't make up for it with nice cutscenes you're going to see it for what it is: a set of props on a stage and nothing more. Essentially window dressing.

This definitely annoys me about ME2 right now...

I'll leave and come back to omega like 5 times and... all those same bastards are still in line to get in to Aria's club. And those same salarians are off to the right making hand motions, etc. 

I'd at least like them to have the game recognize when we've left and returned so that npcs are in different spots even if they are just standing in one place. Would make it a little more believable if we aren't spending a ton of time in the area (run to a shop, buy/sell, and then leave).