Carr might not be the greatest example though- a big reason that he is behind is because he got to school late.
But there are some better examples on the team- Chris Smith is just now starting to come into his own the last two games of the year. Robert Johnson from Oak Grove was one of the top WR's in the state, and he is RS. Even Bumphis has some things that he needs to work on.
But that said, if some of these guys can come in and use their athleticism and make a play or two a game next year, that would be an improvement over this year. Even Carr has been able to do that some this year the second half of the season.
And you are right about South Panola's offense- it's not exactly a real complex thing. To further your point- Madison Central's offense was pretty much option out of the I-formation. Tobias mainly was catching screen passes, an occasional slant that was usually poorly thrown, and then a fly pattern. I haven't seen Joe Morrow, but Ocean Springs barely throws the ball. I'm not sure of their scheme, it might be the flexbone. The most sophisticated offense I saw last year was Tupelo.