I hope he doesn't in a way, if you think about the children, there are two with him and KP, two half siblings with his new wife and on the other side for Jnr and Princess, there are also two half siblings with KH.
If PA does go to Aus, then he'd be taking his four (great for him) but keeping Jnr and P away from B and Jet.
While PA's two have their own family unit, the other four children share their Mum and I feel that the older two siblings could bring some stability and care to the younger two. Not if they are over the other side of the planet though.
I do feel for all the children, they didn't ask to be dragged through the circus and spotlight that all of their parents enjoy.