I would like to see the current "Show Workspaces" palette developed into a tool that can be an alternate to the tab drawer: 1-click selection of which tab is visible, drag-and-drop transfer of tabs between windows and workspaces, choice of icon preview in workspaces palette, etc. (especially if this made it easy to enable expose among tabs). Alternatively, it'd be useful to be able to populate the tab drawer with tabs of other windows, workspace options, etc. ... although I may just be used to tab-bar browsing and its limitations on the number of tabs I keep open.