I agree. Especially about Tanselle = Symbolic Bloodraven. I've even considered Tanselle literally being BR in disguise - the Maynard Plumm of The Hedge Knight. Although, that is probably going too far.
The puppet show is the trigger which eventually leads to the death of the Hand of the King and BR's appointment as the new Hand. So a symbolic BR sets in motion a chain of events that ends with BR as the new Hand. Quite the puppet master, indeed.