Finally got L6 and have been customizing my layout for it's curious habits. The one I really like is the new sections in the passage guide. Plus I'm not the patient sort; I like to mouse over the sources quickly to see who's in the ballpark.
That's why I combine Passage Guide and Explorer in my standard layout, as below.
Passage Guide only shows resource covers/descriptions for mouseover; Explorer shows a sizable snippet. So I let Explorer do the commentaries, plus media stuff. And Passage Guide to do the new stuff. Works great!
Everything is mouse-able and high speed. Plus I didn't know Enoch related to Mat 5.5. Interesting.
.
.