Coral Reef is the only TS restaurant that serves lunch in Future World, but there are so many choices in WS that I would choose a second WS restaurant. It's not much farther to WS from the Coral Reef and even the back section is accessible by the Friendship Boats that go from the twin gift shops at the entrance to WS to either Morocco or Germany if you don't want to walk around the lagoon. Close to the front of WS are San Angel Inn in Mexico, Le Cellier in Canada and Rose & Crown in the UK pavilion. There are also restaurants at the Epcot resorts that you can walk to or take the Friendship Boat from the International Gateway to the various resorts.
Every restaurant has its fans and its non-fans and the only way you'll know how you feel is if you try it for yourself. For us, Coral Reef is not a restaurant that is high on our list.