the feature disparity between the two formatters is quite intentional. the focus for the Kotlin formatter is to support the official Kotlin style guide. we do not want to encourage people to bring all of their accumulated code formatting idiosyncrasies to Kotlin

One more thing to like about kotlin. I've always been of the attitude that I care more about everyone using the same style than any particular aspect of style. With Kotlin, everyone on the team has 'reformat code' turned on in the commit dialogue so we only see whitespace changes if someone's forgotten to update to the style guide settings.