I train instructors to use Canvas through a two-week online workshop (using a Canvas course). The instructors also get their own "Sandbox" courses in which to practice what they are learning. From time to time I find it beneficial to record a screencast using Canvas Studio (Arc) to demonstrate a feature. I have had occasion to grade assignments using the Speedgrader and have found it helpful to upload into the comments section a screencast as a scaffold to guide a given instructor in the use of a Canvas feature. But I would rather not have to upload the screencast to the comments section. Instead, I would like to see Canvas Studio become an option with the comments section whereby I could just record the screencast and add it to the comment right then and there. (Arc/Studio feedback in speed grader - assignment 2.0 requests this.)
My suggestion: Integrate Canvas Studio (a fantastic tool!) into the Inbox/Conversations area.