I would like to suggest that access to the library be made more consistent. I can create a library browser by clicking "+" to add a new tab. However, there is no way to do that through the Tools dropdown.
I suggest, therefore, the following reorganization in the Tools dropdown:
Resources
Library
Collections
Favorites
Access (or something like that)
History
Reading Lists
Visual Markup
The library browser as window is especially important for creating collections since the library dropdown from the title bar tends to overlay the collections drop boxes on smaller screens.