I read this yesterday and went back to some recent reviews of the dessert party to compare (because DH & I have reservations in September)...there is NOTHING NEW listed. It's really "old news."
@GADisneyDad14 did a review back in May and Josh @ easywdw did one in July. If anything, the blog post didn't mention the savory items, make your own ice cream sundaes, decorate your own mini-cupcake/sugar cookie/chocolate chip cookie, or "fruit kabob"/fondu-type plate that the reviewers mentioned. So, if those last items are no longer included, they have (obviously) reduced the number of offerings and nothing is new.
It's very odd - the only thing I can think is that maybe the sales are down so they are trying to bring some attention to it?
Or maybe they are trying to point out that the dessert party options have changed with the introduction of HEA so that if you did the Wishes dessert party, come back to the new dessert party.