I also loved LTT for dinner back in July but would definitely not go back for dinner without the characters. The food was good and all, but I can get better food at Crystal Palace (loved their salmon) and have some great character interaction for my kids. I could also go to Garden Grill at Epcot for Chip & Dale and MIckey & Pluto and have a meal served to us family style.
I have never been to Kona but have heard good things about it. If given the choice I would definitely try that over going to LTT without characters.