This has been covered several times so it should have been in the past threads that you found.

CX seems to release seats at the 2 week mark and again 3-5 days before flight date. This year CX seems to have zeroed out certain flights and/or days of the week (eg. may be zero awards on any friday JFK-HKG, etc.). Checking different flights and dates for the same route often has a lot different availability. The zeroed out flights do seem to have a better chance of getting seats less than a week before. CX is pretty good for last-minute travel but terrible for booking a year ahead.

Final point, Asiamiles members can waitlist for CX awards, so when they do come available it goes to AM requests first. Using AM if you have it, even without MPC status, will effectively get you priority over the AA requests.