The biggest UI improvement could be by simply allowing ALL commands and sub-commands, eg. boundary/sketch line shapes, should be able to be added to a keyboard shortcut, and also by adding them to a resizable Quick Access Toolbar. Then, add a mouse cursor menu with contextual commands (eg. rotate/move/copy/stretch) like Fusion360 would be a massive efficiency improvement, just by borrowing a little code from Autodesk's other application.
Most advanced users don't utilise the ribbon, and only use it occasionally. While the ribbon toolbar is good for new users, it lacks convenience and the most used commands aren't available without several clicks, nor can most of those commands currently be added to the QAT.
This simple improve would allow users more control over the UI for more efficient working.
