I've seen it done; haven't done it myself. But, you can cut the pocket some more in such a way as to allow you to glue in another piece of wood, then rout the pocket to the proper size and sand the entry points to match the existing contours. It's highly effective if you're going to put an opaque finish on the body. But, if you're planning on a dye or transparent finish, the repair will show. Also, if the body is already finished, repairing the finish may be a pain in the shorts.