I used to be a real champion of Narcoossee's. We caught them on a bad day last October. The maitre'd or restaurant manager (not sure who he was) was really rude upon our arrival. Very dismissive (he obviously had something going on, but still) Our server was really bad at the start, but got better as the meal went on, almost to the point he couldn't tear himself away from our table. DH's meal was cold. Probably because said server was engaged elsewhere.
However on a good day it is really great! Don't let me put you off. We had a pretty bad server at Jiko too, so we obviously look like the walk all over types!! Kona was really nice, though I find the location a bit odd. Love Brown Derby, but haven't been there in a few years. Not tried Coral Reef, seen lot's of mixed reviews, so it's one we have never gotten around to. Kona might be a good one, for a relaxing last night. As TBDave mentions you have the options of a lovely romantic stroll on the beach (kids included!!) and maybe catch the fireworks and the Water Parade. You could do this too at Narcoossee's.