QSVEnc question

[Nero]

=> if you can't answer these, this will probably not happen any time soon, since I probably can't motivate myself to spend my weekends testing this.

I honestly can't answer most of these questions since I basically use it to hardcode subtitles in .ass and sometimes .srt format, so I'm sorry.
But take your time, considering an addition for the future is good enough.

(Yes, personally, I'm no fan of hardcoded/burned-in subtitles, which is probably the main reason why I never cared about the option.)

Yeah, I personally only use this option because not all devices are capable of detecting subtitle files embedded in the container.