Hi Scubamouse!
Ok, this is TOTALLY my humble opinion.
Went to Jiko once in 2005. LOVED IT. Went again in May 2010. Was not thrilled. Not bad, just not as good as we remember it.
Went to CG once in 2004. LOVED IT. Went again in 2008. Disappointed. I will say that some people whose opinion I really respect have dined there recently and really really loved it, so maybe it has gotten better, or it was just an off night when we were there last.
Have been to FF 4 times over the past 5 years. Always makes us happy.
Ate at Artist Point in 2004. Loved it, but haven't dined there again, heard some negative reviews recently. That doesn't mean anything, though, really.
WCC is really not in the same category as the others mentioned so far. Good basic stuff. We prefer breakfast to dinner, but only when staying at the WL, not willing to travel for it.
I have not dined at Coral Reef.
Dined at Ohana once, a few years ago. Pretty good, but haven't been in a rush to get back. I prefer the Kona Cafe at the Poly, although the ambiance is not that great.
We have dined at Blue Zoo 4 times. First 2 were AWESOME. The third time was really bad...service and food. We shied away for awhile, but after hearing some recent good reviews, we gave it another try for our wedding anniversary and were blown away. It was great.
(just realized...you are on the dining plan? I don't think you can eat at BZ with that.)
Citricos at the GF is another restaurant that gets stellar reviews. We dined there once in 2003, and it was wonderful, just have not been back there for some reason.
Have a great trip!