...my wife and I got back from Hawaii yesterday and I have to say that as far as the PCC is concerned, "Nay" is the correct answer.
The 'mormon' aspect of the whole thing was only prevalent in the 'Brave New World' behavior of the staff. Nothing too overt but you could just tell that they were busting inside to tell you how fantabulous being a mormon was...(more power to them I guess...but xtainity is weird enough as it is without adding all of the mutiple-wives/magic underwear/Planet Xolob business..)
My biggest issue was that is just felt 'plastic'. Sort of like a 'Disney-fication' of the whole Polynesian culture. (Since finding out that the mormons ran the place it has continued to strike me as odd that a predominantly 'white' religion would be involved in promoting the polynesian culture seeing as how their entire mode was to essentially destroy it and turn the 'savages' into nice 'normal' mormons....)
The layout I found to be very confusing as well, the signs posted throughout the place seldom bare any resemblance to anything that really was in the direction where the arrows pointed, and the maps are only useful if it rains when you can use them as temporary hats because they do bugger-all good as actual maps..
On the plus side the food at the Ali'i luau was fabulous. We opted for the 'cheapest' luau (and the one we felt was most authentic...not sure how 'traditional' prime rib is as a menu item in a luau but there you go..) and were well pleased with the quality and variety of food on offer. We skipped the show as we have seen hip-shaking/fire throwers before, although as others have mentioned in this thread it is supposed to be rather good.
So, hellaciously over-priced for what you get, and all-in-all I would definitely suggest doing something else instead.