I would hope the AI makes better use of the more efficient convoy supply system. It sounds like it's not going to be very integral, when in fact, naval supply is generally the more useful method for it's efficiency (large supply per vehicle at low fuel consumption). I'm not an expert, but I don't think much supply at all should be going, say, through Africa as opposed to into it.
Really? I would go with maybe the USS Houston (so-called "President's yacht," flagship of the Asiatic fleet) or Arizona pre-December 7th, and maybe the first Yorktown until she sank?!