On Thursday 12/13/2018 I upgraded my WSJT-X software to version 2.0. The software upgraded easily and appeared to retain all of my past settings without issue. My JT-Alert X ver 2.10 software successfully loaded the new WSJT-X version and was displaying FT-8 activity. I have not tested the logging function but it should be functional since that was an JT-AlertX setting (HRD 6 Log). As of 10AM on Thrusday 12/13 the FT-8 activity using WSJT-X Ver 2.0 appears to be around 50% (best guess). No reason to delay the upgrade in my opinion.
Two issues needed correction after install:
First, I got an error on install that SSL/TLS support was not installed.
The WSJT-X Ver 2.0 user guide contains the corrective action under the under the Installation section for Windows.
Select the following link - Win32 OpenSSL Lite Package.in the guide.