These are good ideas but they need to be fleshed out more. A lot of younger engineers don't clean up their codebase simply because they don't know the principle

These are good ideas but they need to be fleshed out more. A lot of younger engineers don't clean up their codebase simply because they don't know the principles of clean code or good OO design. A pairing process with senior engineers seems worthwhile, among other teaching processes, but they aren't given much attention.