On my way towards the Copy Editor badge I've been fixing quite a lot of typos recently. Some of them are rather obvious, i.e. desing to design and paramter to parameter.
It has occured to me that an easy way of fixing a number of typos exactly in the same way would be useful. For example, I could ask the site to replace all desing by design, at least, in question titles; get a list of results (proposed changes); and manually accept each of them with a "Confirm change" button.
This would accelerate a process that would be dangerous if done in a totally automated way, but that with an easy manual confirmation step, would add value to the site in a fast way.