So the new one for FF4.0 is not as good? Rated 3 out of 5 stars

I'm still on Pitch Dark for 3.6, was waiting for the new one. Seems at least one review is negative for the new one....was worried about that.
Why can't it be basically the same as the old one?

This review is for a previous version of the add-on (4.0.1).  This user has 2 previous reviews of this add-on.

As the add-on owner, I've made some decisions around the design that not all users may agree with. Certain changes that Mozilla has made to the default theme have influenced where I've taken PitchDark over the years (partially for compatibility, partially because my creative thoughts have changed).