The big problem is always Hitler == he wants bigger ships, bigger guns, bigger tanks and is fixated on attack, attack, attack ... so unless he is convinced that eg. a Jet Engine can be used as a means of propelling some sort of bomb or missile at the enemy it's just not going to get prioroty ...
.. remember the ME262 ? .. could have been a Flying Fortress killer .. but Hitler saw to it that production was delayed whilst they fitted bomb racks ... so better co-ordination would just have led to a Jet powered light bomber ... same for V2 = maybe earlier use, maybe more accurate, but in the end it will always be incapable of stopping the US/UK advance across Europe into Germany (let alone the Soviets)
As for those who suggest a Nazi Atomic Bomb = well the Manhattan Project eventually employed more than 130,000 people across more than 30 sites === hard to see how they could have hidden all that and kept it going in the face of Allied bombing == not to mention that the first US bomb test was July 16, 1945 i.e. some 10 weeks AFTER Hitler committed suicide (on 30 April 45) ...
All the co-ordination in the world isn't going to mave much impact on the final outcome of the war .. in fact, it might make things MUCH worst for Germany (anyone want to bet that the Yanks WOULDN'T have nuked Berlin if the Nazi's were still fighting in Aug 45 ???)
For Germany to 'win the war' means 'not starting the war' == or to be more exact, not doing anything that provokes UK/France until after Dec 6 1941 ... after that date UK/France will be too busy in Asia to care (or do) much against the Nazi's no matter what the provocation (such as Nazi invasion of Poland/Russia )..