I would find an interface similar to MS Words Document Map to be easier to
navigate than the worksheet tabs currently used.

While the tabs do have benefits (color coding, easy to reorganize, etc),
they are hard to navigate through to find the desired worksheet; especially
in a large workbook when the sheet names are long.

It would be easier if the tabs were organized into a list on the left side
of the screen (like the Document Map) rather than scrolling sideways through
a horizontal list. To save monitor real estate these could also be shown or
hidden through the use of the View menu on the Standard Toolbar.