When clicking on a cell in gradebook, the detail tray should open immediately.
In the current gradebook you need to hover over the cell and click on the tiny icon in the top right corner of the cell to get the details pop-up. From a user experience standpoint this seemed confusing and unnecessary. Now in the new gradebook you have a similar process: you need to click on the cell and then click on a tiny arrow (open tray?) icon within the cell to open the detail tray on the right side of the screen.
Why is this 2-click process necessary? The detail tray offers a lot of functionality, it should be easy and fast to access.