The Radar War! An interesting read, thanks, although it's almost a script from Monty Python in places, the Bismarck "advancing" towards the Bay of Biscay etc.
I don't think there's any doubt that the Germans fought the latter part of WW2 with under-developed weapons from the 1950s (V2, Type XXI, Me262), the Allies generally fought the European war with well-developed weapons from the 1930s. The Allies won because they had more of everything and they could manufacture more of everything.
So, with hindsight, no Stirlings, no Halifaxes, no B17s, no Liberators, but 2000 Lancasters twice weekly from the middle of 1943 onwards, starting with the Ruhr, not many Luftwaffe nightfighters equipped with Schräge Musik until late 1943. But following the "what-if" scenario through, if Germany capitulates in 1943/early 1944, what is to stop the Red Army reaching Calais?
Harris's biggest mistake was his obsession with Berlin, he never had the resources to win that air battle.