Except, the old stuff will be effectively untestable, and they'll demand near perfect coverage for your changes. Also, they're will be four incomplete refactor

Except, the old stuff will be effectively untestable, and they'll demand near perfect coverage for your changes. Also, they're will be four incomplete refactorings, and people will insist on it matching the latest refactoring attempt. Which, will then turn out to be impossible, as it's too unfinished.