It's one bullet point out of many in a blog post. "Major announcement" is an overstatement.
What should they be talking about at this stage in the redo that hasn't already been established? The ride system is remaining the same, the theme is based on a known property, it's set in the New Orleans Bayou, there will be dozens of new Animatronics, we know which main characters will appear, there will be new projection effects, the music is a mix of themes from the movie and original songs, they're pumping scents into the queue . . . they've stopped short of storyboarding the major showscenes for us, which is both normal and also prudent given that'll be the main surprise of this ride.
Teasing out the details of the experience isn't unusual practice for Disney. They've put out a few more blog posts than normal for this ride (or maybe they haven't, but they've certainly gotten more attention than normal), but there's also been a bigger cultural conversation around this ride than usual, so it makes sense that they'd feel the need to combat some of that by releasing more teasers.
If you don't like the method by which they're doing that or the quality of those teasers then that's fine, but it's silly to insist that color the entire outlook on the attraction. Pretending they're making some of these tidbits out to be major setpieces is silly when anyone with half a context clue can tell they definitely aren't.