Mass Effect Keep

Going only by past BioWare games the major choices happen when you are finished with the area so they would just need to put in how the world reacted to what happened and not an alternate scenario to if it happened and if it didn't happen in the same game.  The problem is when they need to create multiple sets of assets and alternate locations/NPCs for important things otherwise you have the "Liara Situation" where they place a much larger burden on something they know will be in the game.

Udina as councilor happened when there was still a full-on savegame import. There was really not much of an excuse for that one.

I actually like the idea of continuity, provided it's made relevant and not retconned in a ridiculous way.

DA Keep was a good start, also because I could just go totally random on my choices there and see where it gets me.

If they continue with an Andromeda game and the choices you made I think it is nice to have something like a Mass Effect Keep.
But please, please with the possibility to use it offline as well - it sucks if you want to start a new DA:I but your Internetprovider has a technical problem, your connection is kind of unstable, not as strong as it should be or you have no connection at all for longer periods of time (yes here you have that in most more rural places that rely on Edge, WLAN sticks or Satelite Internet). You can't create a new world state or load one that you enjoyed.

Another issue I had with the Keep was that it felt kind of clunky. I think on my first visit of the Keep I needed more than 1 1/2 hour to figure out how my old playthroughs played out and I stumbled in my first DA:I playthrough on things that weren't like they should be thanks to my trolling memories and wrong handling of the Keep's content.

So, because I love turtles my votes goes to them.