Are there any known updates schedule?
Not sure of the question but WSJT-X works ok for me. It is RC-2 version and use Omni-rig set to kenwood ts-2000 and it follows vfo just fine Set dax rx1 and dax tx1 ...http://physics.princeton.edu/pulsar/K1JT/wsjtx.html
Omni-Rig ... http://www.dxatlas.com/OmniRig/
I've been making lots of contacts with v1.4 Alpha on WSJT-X. It's looking very good. We had an Alpha last week that had a number of issues which we are busy cleaning up this week. We're still working for the end of the month for release. There have been a number of changes in v1.4 on DAX including better buffering, better indications for status and less sensitivity to other things going on with the radio.