Bungie explained their networking updates for D2 very poorly IMO, what they should have mentioned at the reveal is:Do you guys think they will change their mind about no dedicated servers?
At the moment, that is the only reservation I have about the game.
The primary change discussed is the moving of the Physics Host from the client to the server space.
Now, the Physics Host was the one mostly responsible for arbitration of the gameplay, that is deciding who shot who, etc. The problem is, the Physics host had a chance of being selected to run on a poor quality client (high latency/packet loss) which affected everyone's game resulting in many WTF moments. The lack of control over the physics host often led to very frustrating gameplay not just in PvP, but PvE as well.
So moving the physics host to dedicated infrastructure is an ideal compromise between fully dedicated server hosting, and (what I believe to be) a significant improvement over the old Destiny 1 system Sauce
The visuals looked great, but the actual gameplay looked boring.
Even I'm getting frustrating seeing the way some of the current footage is coming across. Very slow, awkward players who are hip firing all the things etc. I would say give the beta a chance, the gameplay is much better when you're in control!