i’m curious by what you specifically mean by no supply lines?
i don’t know if i can rank them as you did but these are some more unrealistic aspects to the game:
Japanese IPC generally > than anyone elses by the end of the game (sometimes even when Allies win :lol: )
SBRs in general
no escorts or interceptors also
AA guns in general
tactical bombing
overall optimal purchase strategy
tech rolling always independent of previous rolls (you should be able to get closer to reaching a tech)
underrepresented ability of subs
no decreased attacking ability during amphibious assaults
rockets in general
no nuclear arms race
no air superiority / supremacy advantage
no impeded ship movement betwen Turkey/Balkans or around Gibraltar or in the Baltic as there is impeded movement in the Suez and Panama Canals
no railroads/ railroad bombing
generally not profitable enough for USA to island hop
Chinese territories too easy for Japan to take over
i can’t think of any more right now…