In 3A, Eastside will still be good, but they do lose some very good seniors. I don't expect them to be quite as sharp next year. Expect Riverside and Greenville to contend for the title next year. My pick is Greenville. They were good this year and they are still relatively young.
In 4A, NW should be the obvious choice for the finals because they were good this year and they aren't losing much. Dorman and Mauldin also return most of their players and lose very little to graduation. Expect those three teams to dominate the upstate next year.