My guess is that it rather quickly be a fix for audio left out - or is the separate function to extract audio from video working?
Performance - it will probably take a while to fix. Since video engine was said to be ready already Q1 - and they waited for licensing stuff only until Nuendo 8 in june - one wonders how this was tested.
Last fall looking at video editors - Premiere Elements 15, Nero Video 2017 and PowerDirector 15 all removed quicktime requirement for most formats by then. And this VidPlayVst run fine without quicktime.
And both PowerDirector and Nero Video at least are very cpu efficient, as is the VidPlayVst plugin. Premiere a little more heavy.
So there seem not to be all due to there is no efficient player code out there.
Corel with VideoStudio and Pinnacle had not removed quicktime requirement then. Then they release v10 - don’t know if they attended to that.
Magix Vegas - no idea if they bothered with this. Magix are not the fastest on maintenance overall - most stuff is at least 16-18 months lead time before fixed. Don’t know if that time has passed since Magix bought all the Sony stuff.
Think it’s time for vacations in germany now - so Steinberg might be gone for a month or so…they could have left everybody with a choice, a setting, to use quicktime still for those more dependent on it. It’s not usable with this cpu consumption - at least the internal player.