As I didn’t play D1 from the beginning but rather about 4-5 months ago, I can say that there are a few issues I noticed.
1) periodically the sound would cut out and I couldn’t hear my character running, shooting, crossing over any obstacles. Then I would hear my weapon fire when I was through firing. I had to shoot again to make it stop.
2) there was a lot of server interruptions and me getting kicked multiple times. I know it’s a beta so I’m sure some of this will be taking care if as for the base game release.
3) From time to time there would be floating objects and sometimes people in the freeroam area.
All in all I think this is a great game. I still play D1 but will be getting this also. I feel for the total experience I obtained, this will be a great release.