For beta 2, if you import the root project that has the settings.gradle, you'll get a project for each sub-project, in addition to the root project. Beta 1 tries to do it, but I've found some bugs since, so it can fail.
I overlooked the argument passing for Gradle. For debugging, there's a Debug -> "Start with arguments..." menu entry, which is grayed out for gradle. Build -> Gradle Options will be updated to allow you to set the arguments for a plain execute as well. I should have that ready for the next beta drop.