I almost feel guilty about using the free dining knowing there are people that save and work so hard to give their families that Disney magic. I hope the reduced stress from not having to worry about the food prices makes YOUR time as magical as the kids'.
I would cancel the luau and try Concourse Steakhouse , Kona Cafe or Ohana depending on what your young men like to eat. Unless it has improved greatly from when my DH and I went I don't think boys the age of yours would find it that great.