3D Artist BINGE shared a helpful tip on using blend shapes.
This quick video provides a tip on how to make bulk changes to the topology of a large number of copied objects by creating a blend shape first, then adding changes, and baking it.
It's really helpful when you spot an error, and 3D Artist BINGE has many other tutorials that can simplify your Maya workflows. Although the videos are in Japanese, their steps are very intuitive and easy to follow. Check out some others below: