Take a note that castle constitutes part of secondary objectives too where it was properly marked. Naha is not marked at all but some capture point on the north is wrongly marked instead: 
At first I thought land deployment zones at the north of the island were not intended but on the second thought and because they do not appear later on this was probably made to land some Raiders. On the north biggest challenge was to traverse trough forest terrain. Because of wilderness I expected caves to be here not on the south where lot of action was taking place anyway. Message about upcoming fleet was misguided for me because I rushed bombers in that direction finding out they will reach map edge in 5 turns not Okinawa coastal waters where my ships were. Was unable to shoot at Shinyo Suicide Boat with torpedo from submarine. Not sure is this intended.
I noticed that if player wants to reform a unit using reform button in units info panel (i) he is asked for confirmation. Is this really necessary?
Also as I play on 2D tactical map soon enough I realized permanent wrecks should be turned off because I did try to sink a sunken ship once.
There is a good RP boost in this one compared to previous scenarios but I did many wrong decisions and manage to lower my advantage. One of the big mistakes was to buy B29 bomber before Tokyo because I am not sure I will be able to rearm it to A-bomb or do I need to buy specialized unit for it.