This is definitely an important feature to add. Please let us know where it is on the road map. :)
We could definitely use mass edits or the ability to change the title prefix at the project level and it automatically changing the prefix for the rest of the project!
Please add this to the blueprints template feature. We have projects that need to be created in advance but deferred. I chose "Deferred" for the project and each task for a particular template. Wh...