There is progress, Direct Media/Media Bypass is currently in TAP and has been for a few days. Can't say too much but it seems to be going reasonably well at the moment, some issues have been seen and resolved.
Some scenarios are still being looked at, eg when a user has multiple devices it causes challenges so there is still work to do for complete functionality under all circumstances so there is likely to be a phased delivery, eg DM might be disabled for certain call flows until all the wrinkles can be ironed out.
But it is on the way, though I can't predict any GA dates at this stage.
There are lots of interesting topologies coming down the line with work we are doing with Teams that will help with distributed deployments, geo-redundancy, etc
As this is future stuff it can't be discussed publicly but keep in touch with your AudioCodes technical contacts to learn more :-)