“For Harry, separation, pending a reconciliation that may never come, may be the best bad option.”
He should seriously consider that, and try his best to reconcile with the family back home. The problem is the kids... Meagan (however it’s spelled) will hold on to them like grim death and use them as pawns to negotiate everything for the next 20 years.
The kids have royal blood, so I wouldn’t be surprised if a tug-of-was were to happen.
Since Harry is part of a royal family, he would have no problem having the kids removed to Britain and having the case handled by their courts. Diplomatic immunity would apply to Harry and the kids as they are not US citizens and part of the British government.