If you are interested, there’s support for importing Gradle/Buildship projects into Eclipse with Oomph:https://github.com/eclipse/buildship/tree/master/samples/oomph-setup
I do think that your efforts should be a part of Buildship, though.
Eventually, it will, but I need feedback (if it works as other people expect it to work) before I want to invest more time into code coverage, etc.