We've eaten at WCC three times and Kona twice.
I think WCC has gone downhill in recent years; our food and service were not nearly as good there in 2006 as previously. Because no one "loved" it, we aren't returning there this time. If we stayed at WL, I'd eat there again, but otherwise, it's not worth the time to get over there.
Kona is better food and we had better service there. Our dinner was so good we returned for lunch a couple of days later.
On our upcoming trip, we'll be eating at Kona but not at WCC. All 3 kids and DH requested Kona when I was planning ADRs for this trip, so we'll be there again in July!