As other have said, DVD burners like the Optiarc AD-7220A that use MediaTek chipsets are not suitable for scanning CD media. The chipset only reports C1 failures (E31) and C2 failures (E32), where proper CD scanners report at least all C1 errors (E11+E21+E31) as well as C2 failures (E32).
So I wouldn't depend on scans from that drive to determine which burns are good or which which burns are better than other burns. IMO you can only really use such scans to see which burns are really horrible - i.e. showing C2 failures.
The assertion that Falcon CD-R media is going downhill is therefore not only based on a single batch of discs, but it's also based on flawed measurements.
So I wouldn't conclude anything from the evidence at hand.