Depending on how one views this season (is it about wins or development?), the Cleveland Browns have been successful in getting younger players more experience and growth while getting on-the-job training. Whether this is good or bad depends on the eye of the beholder.
But one thing is for sure, both the offensive line and defensive line have played significantly better this season. Minus the black hole that is left tackle (more on this later), the offensive line has stabilized at center and right guard. The defensive line has figured out how to set an edge (an issue that has plagued this team for years) leading to a much improved run defense.