The new IntelliJ IDEA 2018.1 EAP is here! Among other improvements and bug-fixes, it updates the Kotlin plugin to version 1.2.30.
The updated Kotlin plugin has some new intention actions. Now, in the Project Tool Window you can paste a code fragment directly into a package, and the IDE will create a new Kotlin file with the pasted code.
It also offers new intentions that convert the scoping function calls let and run into each other, as well as also into apply and vice versa.
In addition, data flow analysis now works for mixed Kotlin and Java codebases.
There are also new warnings of possible conflicts introduced by the Rename refactoring.