My wife and I did the same thing a year later! Honestly, after going to this 17 years apart (we went on our honeymoon in 1997, and with our three kids in 2014) I can say that it didn't hold up well. The food was just slightly better than average (like it was ok but not worth raving about), and the experience was...fine both times. It's exactly what you'd expect from a luau if you ever saw one before live or on TV. It didn't seem to be worth it to my wife and I to pay out of pocket or to use 2 table service meals per person for it ever again, back when that was a thing. I know the performers and servers put in a lot of effort, but this is about the most basic a luau can be IMO.
My wife did take her mom to Hawaii once a few years after our honeymoon with a travel group, and they went a luau on the big island. She said the dancing, music and food were much better in Hawaii.
My $0.02 on this is that once again Disney is focusing on what will bring them the best revenue and profits in every area now and in the next 5-10 years. We all roll our eyes at stuff like this, but there will be people lining up to give disney their money. Personally, a DVC share which overlooks the water and faces the magic kingdom's fireworks sounds really nice, if you can afford it. If people will line up for a freaking figment popcorn bucket all the way around EPCOT, surely there will be several thousands of people (or however many they sell) who want a piece of this.