Concurrency - Lambda based message passing

[LogicParrot]

- The player object needs to fracture all its actions into tiny bits, such as "ContinueLogin()". A hundred tiny functions and no-one knows when to call that specific one

No! Not at all! You just fill the code right where I wrote ContinueLogin(). This is not an extra function. Sorry for being vague there.

Edit: I replaced ContinueLogin to avoid further confusion.

Let me think about the rest of your points.