Hi,

I typically travel JFK/HKG two or three times a year, plus a very small amount of short-haul travels. So far I have been booking all my trans-pacific travels with CX, and banking all of my miles with MPC/AM.

Recently, however, I've been re-thinking this approach. My travel patterns mean I'll be at most SL with the Marco Polo Club. On the other hand, I could have booked the same trans-pacific flights with AA, bank my miles with AA, and easily achieve AAdvantage Platinum (OW Sapphire). Seems like the only downside is the fact that AA miles can't be used for upgrade awards on these CX flights, albeit they are code-shared - but seriously, with the introduction of Y+, it's not like Asiamiles are worth all that much in the upgrade award department.

By abandoning CX/MPC and directing all my trans-pacific travels to AA, I get marginally better treatment on CX (OW Sapphire > MPC SL), somewhat better treatment on OW airlines (Sapphire vs Ruby), and significantly better treatment on AA. Emotional ties aside (CX being my home carrier and all), it seems like my loyalty with CX is a bit misplaced and no longer makes economic sense. If you were in my shoes, would you ditch MPC?