If you want to go test it out in the WB go for it. Seems a bit of an undertaking I'm not quite sure how to tackle it. Also, taking a cursory look at the Pacific Islands it seems they are pretty well aligned with the Americas but as you said, that's far less important than being aligned with the Old World. Also, re: New Guinea, I'd move it (and subsequently Australia) South even if Indonesia was left unmoved but that's just me. Or enlarge it.