Cumberland is not moving, they don't want to be in the same region as Maryville.
As for the Raiders - I think it boils down to one thing, depth.
Lets face it the defense held Smyrna to 10 points in the first half then they got tired.
Plus - if you counted the number of good athletes on Smyrna's team and Coffee County's it would be a 2-1 margin (at least) in smyrna's favor.