The G'MIC tool is now almost ready for release, but I'm still going to spend another 4-5 weeks to add a few more features that will be mostly targeted at beginner/casual user.
I will also do some initial research on integrating functionality of the Natron compositor ( http://natron.fr/
) with Flowblade. It provides a programmable interface in Python, and could thus offer a lot of interesting possibilities, like maybe adding ready made text animations or animated backgrounds that can rendered on request.
Natron is not in Debian repositories yet, so it is not possible to add it as a dependency for a .deb package, but once it is available in e.g. Ubuntu/Mint there may be a lot gain here.