As for the network: Vienna has shown that it's possible to do better.
At the same time, with 1000+ people in a room performance isn't going
to be great. Poor network performance during plenaries and other
crowded sessions isn't the end of the world as long as the network
functions well elsewhere.
It might be a good idea to stop comparing Minneapolis to Vienna. Vienna
had a host and Minneapolis did not.
Having a host is a good thing but few companies are willing to step
forward anymore. Solve that problem and many other problems get
solved... including more important ones like having a T-shirt.
-kevin