Aw, I'm also sad to see Yachtsman got cut. They've really been hitting their stride lately. I hope you try it again eventually. Every Disney restaurant is capable of having an off night (including all the signatures). In fact, some of our worst experiences have been at Flying Fish, Citricos, California Grill, Narcoossee's, and Jiko, but they've almost all redeemed themselves in subsequent visits.
Have a wonderful trip anyway! I'm looking forward to your reviews of California Grill and Narcoossee's (those are the two signatures that haven't yet redeemed themselves to us).