Thanks for the screenshot, that's very useful!

My recommendation is to install the suggested connectors with the exception of the Tycho one. They are useful anyways when working with M2E.

Regarding the Tycho issue my recommendation is to configure it to be excluded in the M2E config in the parent POM. It's not needed when working within the IDE, apart from working with the OSGi integration test I'm proposing with one of the pending PRs. But for that you'd need to build the engine JAR anyways, so there is no need to map the maven-bundle-plugin execution.

Maybe you could send a PR for that one?