This feature is still in beta and subject to constant change. We encourage you to use it in test projects and provide your feedback to us.
However, DO NOT use it in production where it creates dependencies! Always back up your projects to make sure that you can go back to a previous version.
The CRYENGINE plugin system exposes support for creating plugins in both C++ and C# and allows users to simply drop a plugin into their project and to see the benefits instantaneously.