this is what iam afraid of from cross server DF

[cynical_baby]

So basically you fear that people will need to start communicate again and find a common thread, and they may be not able to? I don't see that. There may be some communication difficulties in the beginning, but people will solve them. It will bring new views and new tactics to other players, and eventually they will have a common thread. In contrary i think it will help progress and clear content faster in the end, when players stop to insist on their own views and open up to other ideas. And I think they will!