The organize import function still doesn't consult the external jars to resolve imports and just nukes the ones it doesn't find. In my example, these are imports from the junit jar.
The first 2 attached screen shots show a before/after situation when using explicit imports.
The next shot shows the error generated when using wildcards
The last shot, for reference, shows the structure Intellij builds from external jars (e.g. junit). SE should do something similar to be able to resolve symbols.