In what way do you consider it "bad"?
In the newer series
- the toolbar has many more buttons
- the toolbar has four configurations -- None, Small, Standard, Large
- just about every major game action has an assigned hot key
- hot key assignments are indicated by toolbar tooltips, also in the game menus, so memorizing them is easy
- just about every major game action can be achieved by any of: menu selection, toolbar button click, hot key
Additionally, there are other minor UI tweaks and improvements.
Otherwise, the Series' UI is much the same.
I find the improved UI much more appealing -- especially the hot keys.
Of course, Your Mileage May Vary.