Just few days coming form Eclipse to all this "intelligent" stuff, I miss two basic intelligent things from Eclipse.
1. Remember where I was before. That is, I'm in class A, open class B, close class B - in Eclipse I'd be redirected back into class A (and that works with any length class chain), but Idea unintelligently forgets and redirects me to the first class in editor.
2. Open missing class. In Eclipse I could press F3 on a class which says it is not found, and I'd still be redirected to that class. In Idea, that does not work. Eclipse has more into it - also opening by partial selection which I found annoying as I never found any use for that, but had a lot of cases where I had accidental selections and pressed F3 wanting to navigate by full class name.