Because of a number of situations, I must continue to use Ecco Pro and IQ, sometimes side-by-side. The difference in the readability of the outlines is striking. I find that the relationship of an item to the overall outline is much easier to see in Ecco than in IQ. This is especially true when I have zoomed the outline a few times.  I have tried using the tree lines in IQ, but is is minimally better. While I realize that screen real estate would be "wasted," is it possible to adjust the amount IQ indents each level? By the way, I can see the argument for outline styles here, as that would be a good visual indicator. However, it is not the same thing, and can add to the visual clutter.

 

Just a personal opinion - others may feel very different.

 

Jon