Not sure how you calculated this but for F, you would need 5 return trips from USA to HKG to reach diamond. This is a slight reduction from 6 return trips under the old system.
Wait so that 120 TPs is OW and not RT? If so I guess I do have a chance then...'
But still flying AA transcon would get me points than flying CX transpac which still wouldn't make sense, but I guess mine win their loss.