"Project":

• missing the button "Show libraries" available in "Packages". Showing libraries is rarely used, I'd like not to show libraries. When th tree is expanded, often libraries are also expanded, which makes a huge tree (think JDK..).
  OR "libraries" can be made a scope in project view

"Production", "Tests": not usable at all !! - it always looks like packages are flattened, too much screen pollution

• no grouping by module
• every directory has root entry => the list is huge (unusable). For small project with 10 modules (~200 files), without "flatten packages", fully collapsed, whole toolwindow is occupied! Root entries show FULL path to the directory. Every middle directory shows FULL path as well!

So e.g. for me the most usable would be "Packages" + "show libraries" button.
Ideally, I would like to use scopes "Production", "Tests", sometimes "Libraries" - if it will appear.