My main reason to not use Eclipse 4.x was the new UI and lack of the Show traditional style tabs option in Preferences > General > Appearance for classic themes (which almost achieve the old look again)… but as I found out today there are workarounds:

Find the CSS file of your theme and replace swt-simple: false with swt-simple: true. Have fun with traditional tabs again!

Edit: Works with Kepler too :)