The only way i can see dedis working effectively is if they are implemented in all major regions or else the US gets a bigger advantage than they currently have. Great for the US but the rest of the world wont be happy.
BF3 has Europe, West US, East US, South US, Japan, and Australia. Its fine for the most part. It means however that if you me and an aussie played together where gunna get shitty connections still.
If your playing on the Europe server because of me then your going to be in the same situation as before so would the Aussie. If i play on your US server im in a bad situation.
The only thing its going to do is stabilize the current connection environment and create less of a host advantage but in turn its going to create a regional advantage.