That is because the cert refund values are all based on the OC certs they were derived from.

The difference between the current cat 6 and cat 7 is 10k per night and indeed if you were to purchase a new flight + hotel package from Marriott today you would pay an extra 60k to move from one with a cat 6 hotel to a cat 7 hotel when purchased new (10k/night, 5th night free). There most certainly is a different order code for the post 8/18 travel packages that reflects the different refund values of those packages versus the OC packages. Since the new travel packages are not a good deal it is unlikely anyone has purchased one to find the new order codes and it does not really matter for someone with an OC or converted cert since you will not get the refund value of someone who purchased a package today and you would not want to order a cert based on the refund values of someone who purchased a package today (because it is too expensive).

The issue some are not grasping is the mapping of OC to NC certs. In order to convert an OC cert to an NC cert there is a mapping and if your original cert was an OC then you will be charged OC mapping prices to upgrade. What some people are hoping for is akin to buying something onsale (OC cert, converted to NC cert) and treating the value of it as if they paid the full current points cost for it and expecting to exchange their converted cert for another based on the full value that they never paid. It doesn't work that way. If you go to a store and buy something on sale you cannot wait until it is not on sale and return it for the full non-sale price.