Scroll over top panel to switch workspace
It is possible to quickly switch workspaces without the overview using just a keyboard (Super+PgUp/PgDown) or using the touchpad swipe gestures, however when using just a mouse opening the overview is required to switch workspaces.
A solution for this would be to switch workspaces when scrolling over the Top Panel. This is already implemented with this extension and in i3/sway workspaces can be switched the same way by scrolling over the bar.