Give teachers the ability to "hide" individual assignment group and course total columns. If the column is hidden, don't display the total to students either. This has been a much requested feature at our institution, as some faculty use assignment groups for organization, but totaling and displaying grades for these groups ends up causing a lot of student confusion.
You've probably already seen this one, but if not, you may want to add your use case here https://community.canvaslms.com/ideas/3477-hide-grade-columns-for-teacher-gradebook
We're not exploring this for the current New Gradebook scope