I do think they could have possibly made a metal Mosquito, but as far as I know the Mossie was an order of magnitude superior to all other fast bombers in the war.
I don't. The rationale behind the Mosquito was that it was made of non-strategic materials. If the aircraft was to be redesigned to be made of metal, the time factor would have been enormous, let alone de Havilland itself holding design rights. The Mosquito was not designed and constructed like metal aeroplanes. The whole thing would have to be started from scratch and why devote that much effort to doing so when there's a perfectly capable wooden one with commands across the spectrum begging for more examples of the type? Then the next question is, how long, once our metal Mosquito has been drawn up, is it going to take to get it into production and service? How useful would it have actually been by then? Why waste the resources and time in doing so when operators are crying out for the type in its initial form? It would have been far more expedient to have been built as it originally was.
When debating this topic we tend to miss what the Mosquito brought to the table and why it was so vaunted and it wasn't specifically what it offered to the strategic bombing campaign that made it so. The real secret to the Mosquito's success was that its one airframe was broadly adapted for use outside of the scope of its initial design as a bomber. Its performance and capabilities lent it to high altitude photo recon, target marking, low-level precision strike, maritime strike, night fighting etc, all of which were not strategic bombing.