We ate at Shutters twice last month and we were very pleased with the total of 4 different meals we had. It is an open, pleasant room and the servers were very nice. The roasted Chicken dinner I had was one of the best meals I had in our 11 night vacation which included 5 nights in WDW.
We also had appetizers at the Green Cabin Room. It is a very pleasant spot. They have live entertainment many nights and we enjoyed it.
We were disappointed with the quality of the steaks at Sonya's. Everything else there was wonderful.
We have been to Vero Beach the past 2 Octobers. We did not need reservations in advance to eat at Shutters. I don't know about other times of the year.
Enjoy