There are worse places than Southern. Not many, but they are out there.

A 16 hour duty at Southern would be a pretty cake day. You may get that on BAH-HKG. In reality, expect to be awake for 24+ hours every "day". The 24 hour layovers just are the exact wrong length to recover from your last flight AND be rested for your next. So you have to stay up when you get in for 6-8 hours, before you let yourself fall asleep, because when you wake up, you won't have another good opportunity to rest before its time to fly across another ocean.

I don't have first hand knowledge of how the 5th triple affected the schedule, but I haven't heard anyone raving about improvements. Southern never seems to get any better despite all the changes. Its a magical place.