You can always go to the interview and gauge by yourself.
And if you're succesfull and not interested, tell them why.
Lot of friends of mine did just that, they were offered a job, then CX cut on the expat conditions, so they decided not to move to HK.
It didn't change anything, but I guess it could if they eventually stop finding enough suitable candidates.
If your daughter is in school age, beware. Like others have pointed out, the waiting lists are very, very long (3+ years) unless you are willing to pay 400,000HKD in debenture.
It's really sad that CX is not what it used to be.
If you want the wide body experience, QR, EY or EK are better choices.
Sure, they might not be career airlines (if your wife doesn't like the middle east) but neither is CX.
I can garantee the pollution in winter will make you sick (if not literally, at least figuratively) and want to go home.