There is still the unanswered question of what BR intends to do with the 777-200LR's they ordered. Rumors abound, facts are scarce. EWR-TPE nonstop would be one possibility. Convert all the orders to cargo models or 300ER's would be another.

I 'think' allot of the issue NYC-TPE would be that airlines would prefer to just avoid the politics of the most direct route. A fuel stop in SEA or ANC makes financial sense because they can transport more valuable cargo and political sense because it avoids discussing any overflight issues.