This tool is our prototype tool and it’s not complete at all, so that’s why it’s (extremely) experimental.
We’re re-designing this system to be more flexible and extensible, and we wanted to do this by 4.17, that didn’t work out in time, and I hope we’re going to have something working by 4.18. (It may still be experimental, but have something to show)
Yes finger control is a must and head IK is not there, but we’re working to be a better foundation of the system, and I hope that is worth of the wait. 
Thanks,
–Lina,