Um...

Why is that youthful? I'm going to TH in Feb & Apr and I'm likely a bit older than you! Purists are gonna let you know there is no 'U' in Qantas' name, but I smell what yer cooking. Don't see how enrolling in QF FFP will benefit you to a greater extent than AA's: r/t CLT ORD HKG BKK is about 18,800 miles leaving you only 6,200 miles short if first elite level (Gold; OW Ruby)--if you happened to book in my fav Premium Economy [I like me some biz too but normal peeps don't generally buy those seats on leisure; if they do, they shouldn't be looking for 'steals' or tricks here], you'll qualify Gold on return flights by points. Since you booked a codeshare, and yer eager for status, enroll in Platinum Challenge and depending on tix bought, you could be midtier status all of 2014. I'd certainly look/consider the PEY on CX for flights of those lengths...