I advocate a night bombing campaign against UK, no daylight raids allowed, losses would be far too heavy. UK nightfighting/interception was quite primitive, and german losses after the switch to night bombing were far lower, and sustanable (the Blitz started in Sep 40 -> May 41).

Regarding Pearl Harbour, it might not have happened if Barbarossa was never launched.

BTW, would the USA have entered the war had Japan only attacked UK possessions in Asia (ie HK, Singapore)? I believe I read that they would have, but I can't confirm that....