I believe that under AFPS75, you are required to achieve at least 1 year in rank before being eligible for a higher pension (and 2 years before it's the full pension for the higher rank). So the promotion won't make any difference to his pension at all.
In addition, the XO post was offset from the demise of the COS SPP post from the HQ - so no net increase.
We know that the HQ is going down to one 4-star and two 3-stars, the main area for discussion seems to be the 2-star posts. Any proposals?