As you may have noticed, the core team isn't working very actively on v1 at the moment. We're currently focusing heavily on v2 development, the current state of which can be seen in the master branch. It is still very early and no support is provided for it at the moment, but you are free to play around with it and help discuss things in the issue tracker. You'll find a number of relevant issues there that we've created to help us figure out what your needs are.
With this large focus on v2, v1 is only supported by the core team for critical bugs, moving forward. That said, we are happy to review PRs against the mdl-1.x branch for any non-critical bugs or new components, as we did for chips on this release. Fixes and bugs must not break compatibility with existing applications, though, since it's still the 1.x line.