No, we don't because of that crafty change of mood half-way through the sentence.
Nothing they do at the moment is complex, in terms of data requirements. It may be hugely inefficient, but that's not the same thing and to be ever so slightly charitable, they've actually made strides to reduce that nonsense. And by your own admission, beyond the horrorshow of stupidity that was gleamed through early traffic analysis, we don't actually know anything about the complexity of the game at the moment. You are confusing you wild fantasies about things that may at some point come into existence though liberal application of magic Germans with what might actually exist behind the scenes at this very moment.
The fact that they have no real persistence or world state, alone, means it is inherently insignificantly complex in relation to any and all MMOs ever produced.