Originally Posted by
phltraveler
It's probable that the status will remain at the 50 night level (previously MR Gold, now MR Plat in merged program) for the remainder of 2018, expiring with the end of the Program year in Jan 2019. This is how it was handled for RewardsPlus, so Amex status match will probably work similarly.
On RewardsPlus,
per Marriott Insiders:
Since Amex is similar (it offered Gold match [50 night level] before program merger on 08/18, and was still offered at gold level [now 25 night level with no lounge access/breakfast] in merged program), it will likely be handled in the same fashion as RewardsPlus (same deal for UA elites).
This is not what they communicated prior to 8/18. They were very clear that anything that was matched to *W Gold would get Marriott Gold and everything that was externally matched (not from *W Gold) to Marriott Gold would get the new Marriott Platinum. Now, they could have decided to make it easier and more generous in the meantime, but I somehow doubt it.