I very much appreciate the workspaces feature, but I notice that I keep forgetting to fully use it: I forget how many tabs I have open, whether I've been actively using other workspaces, etc.
Adding a badge icon (similar to iOS badges) next to each workspace would help visually keep track of the activity level of each workspace, making them easier and more fluid to use.
Adding a keyboard shortcut to navigate between workspaces (e.g. Ctrl-Shft-1) would also make them far more fluid to use.