Oh yeah. I agree with that completely. I was re-enforcing your point to the OP, not to you.
Before HD, before Reclock had an AC3 encoder and before practical options for PCM over HDMI I was using bitstreaming for DD/DTS and I was one of those most fervently arguing it needed to be retained and that it was a good option if you knew what you were doing. If you search back a few years in this forum you will see. I still feel the same although the need now (with PCM over HDMI) is less great IMHO.
But as you have done too I still think its necessary to point out it is "not recommended" for a reason! (on the other hand I don't know why using vsync with DXVA is "not recommended", it just works, but that is a completely separate matter!
)