I think a lot of players over look the power of Midway Island SZ25.
So Japan blocks SZ16 with a DD and the USA throws out their DD in SZ25 and we all move along.
But Midway has a airfield, SZ16 is open ocean.
On USA 1 they can put 2 xDD 1 sub and 3 FTRS on midway.
So Japan pushes their DD out into SZ16. USA comes in with a Sub and 3 FTR and kills their DD and moves the air craft back to midway.
How long does japan want to keep just throwing out a DD into SZ16 knowing full well that the midway task force will just kill them at will?
Japan goes at Midway, well now they have a fight on their hands, air craft can scramble and Japan will take some hits and most likely get a counter attack from the main USA fleet in Hawaii or W. Coast.
So by stacking Midway with 3 FTRS, a sub or two and 2 DD, you can project a lot of power on SZ16. Does Japan commit enough naval power into that SZ16 or give it up and retreat back to the home waters and turtle there?
If you are feeling your oats on USA1 the Hawaii TRS takes 2 inf from Hawaii and puts them on Midway and the W. coast TRS brings down the INF/ART to Hawaii.