This idea has been developed and deployed to Canvas
The Grade Override feature for higher ed courses with multiple TA's / instructors is problematic in the fact that one instructor can turn it on and adjust students' scores but the other TA's / instructors will not see that unless they turn it on as well. This also prevents instructional designers from being able to flip this on during the course build out, if they knew it was going to be needed, as it currently wouldn't show for any of the TA's and instructors. I know that this will cause confusion for our faculty as well as more support tickets for my team.
I would love it if the grade override feature behaved like every other course feature, if one person turns it on, it's on for everyone (with the rights to see the gradebook for that course). I know Canvas strives for consistency and this seems to be inconsistent with all other course feature behavior.