I had to check for myself, since that's not the "normal" Marriott way. Sure enough you're right. My guess is that its not so much a Marriott directive as it is one from Vistana Signature Experiences who owns the property. From a quick read it appears that they own these and fall under the Marriott marketing. Either way its a deal breaker for me.
I will say that it's pretty clear that Marriott is trying to get more money out of the properties, I'm not a fan of the rates I'm finding at Swan/Dolphin. Either it pays off for them or we start seeing the deals return once we know the real impact of Galaxy's Edge.