I guess in this time line, the balance of power has always been fair closer than this one, so the US and Philippines would have incentive to push their enemies to the ground than avoid the risk of WW3.
Though if I had to speculate, does the Philippines in this time line end up incorporating bits of the other Island nations? As in the Philippines, Malaysia, Indonesia had plans of one grand super state to unite against the various greater power and their colonial masters trying to come back dominate them, it fell through for a lot a reasons, religious and ethnic issues of who be a minority, concerns of who would hold ect.
Still the Philippines did try and take Sarawak from Malaysia in 1967 in a operation that failed horribly and caused the Moro insurgency to come back.
Given Indonesia was in massive civil war/colonial war against the Dutch for a couple of years, Malaysia here thanks to China being more powerful would crackdown on their Chinese minority far more and likely cause that insurgency to last longer.
I would not be surprised if the Philippines had a few years to annex a decent portion of both and states willing to back it for various reasons, such as creating a enemy for Japan that's loyal to them, countering China and just even creating a ''Christian'' Bulwark against the Ottomans being a nation in a region with lot of states in their cultural sphere and allied to them.
That the USA would try to intervene in CAR is expected.