I still use Capture One's Live View which is ok, in absence of other solution
Just that bloody window does not (automatically or at least MANUALLY) change the orientation when you change the camera from landscape to portrait. What a bummer.
I have the same issue with Capture 1. I can't believe that they didn't include the option of at least manually rotating the live view, and since I shoot 75% in portrait rotation it makes their live view option unusable.
In any case, I contacted Sony again and they gave me an update. Their engineers were able to replicate the problem on their end and acknowledge that it is indeed an issue, but they don't have an answer for me yet.
Will post again once I have another update...