Data point, and follow up to my post right above this. Based off of about 4 months of studying ex-SYD towards (eventually) ICN.
Just booked SYD-MEL-SIN, with SYD-MEL in J and MEL-SIN in F for next year. F awards for my date opened at ~275 days out, which doesn't fit any of the "X days out" patterns I have read about. What seemed to happen is first class seats were released to Date X (e.g. January 8, 2020), then no extension for several days, then released to Date Y. There's probably a pattern, but I didn't see it, as today seats were released 20 days further out than my last search 3 days ago. Also: 2+ seats (probably more) released at every date once available. And direct SYD-SIN awards were never released for any date during my search (including at least 2 times when I searched the entire calendar).
So AA getting awards at 330 may be correct for economy, but business didn't seem to match that, and first class definitely is below 295.