Ubisoft has been amazing with their suppport. Server side updates, patches have been consistently rolled out almost every other day.

It's not amazing it's how it should be! I'm really liking it so far, it's much better than the first.

Yes, playing solo right now. If you join someone elses game, thier game progress will be different then yours.

I played the 1st game mostly by myself. But joined up for main missions with random groups. That seemed to work out pretty well so I'll be doing the same for this one.

Yes, totally solo here.

But now they have implemented such a cool feature: from time to time you'll hear "Agent in need of backup" - that means someone is calling for help (you can do that when you die i.e. in a mission or just freeroaming), if you go to the map and accept you're ported to that person's instance/map/mission to help. Enemies upscale, but usually all goes well and it would last about 5-10min then you can go back playing solo - I really like doing that.

Cross save just isn't going to happen. There's ubisoft accounts that have played it on all three platforms.

That said raid/incursion exclusives aren't so exclusives anymore and not really that deal breaking. Its the expertise/proficient that's the big hang up.