This idea has been developed and deployed to Canvas
Sometimes an instructor will create a quiz question and accidentally make it worth zero points. This happens most often when using an exam-creation tool like ExamView or Respondus. It's an easy error to make.
When the instructor realizes it, it is usually after a student has taken the quiz and the score comes back unreasonably low. It's because many questions were right but worth zero points. Canvas lets the instructor change the point values after the fact, but forces a manual regrading (via speedgrader) of every question for every student who has already taken the quiz.
Why not allow a regrade of the entire quiz with the new point values?
This would also allow instructors to change point values after the fact (make a question worth less and another worth more) based on statistical data on how students performed on certain questions.
Comments from Instructure
This idea was completed with general availability of Quizzes.Next. You can find more information about the overall project in the Quizzes.Next User Group.
Quizzes.Next is now available for all paid accounts.
Quizzes.Next updates will be included in the Canvas Release Notes.This includes new features, updated features, and relevant fixed bugs. New and updated features will be deployed to Quizzes.Next near the same time as the Canvas release. Fixed bugs may be deployed at any time.