I totally agree on 3 (aka the unstoppable Hawaiian Express). US should have to fight onward to Hawaii after losing the city of Honolulu. They shouldn't be granted a cheesy free 3-turn pass that would allow them to mass up on the West Coast then drop 5 carriers in the Hawaiian waters because of a reason which sort of negates point 4 above.
Arriving units via the Hawaiian Express get placed on or near the island south of the Eastern port, then get to *move*. This makes any Japanese trap at the Hawaiians useless because they are spotted immediately upon the placement. I have lost many IJN boats sitting in dock refitting or laying in wait, watching each US carrier decimating 1 naval unit. (Oh Musashi!) After the airstrikes, the carriers run NE of Hilo, which puts the IJN split-up fleet at a severe disadvantage, as opposed to just concentrating their fleet and search efforts to the East of Hawaii.
Further game note: I'm in '43 and the US has already researched Naval Warfare (3), Long Range Aircraft (4), and ASW (2). :eek: