They're working hard to put everything into the new settings UI, which I'm not a huge fan of. I guess they're trying to get away from the perception that Windows is a nerd's OS. I'm okay with that as long as I can do the things I need to do.
With this build I "feel" much snappier performance on my hardware and have been able to drop my venerable MOTU 8pre latency to 128 samples, which I have never been able to do without pops, crackles and other hoody-ha. Windows 10 has the beginnings of a capability to isolate audio work from other DPC interrupt routines by locking it to one core while relegating network, video and other stuff to other processors, which should make DPC troubleshooting a thing of the past.
I do not know where they are in that evolution, or even if it's in the current Windows 10 builds, or if it's been made active. I do know that the performance I'm getting out of this build with respect to audio exceeds RTM release on my machine. I can't quantify the gains other than to say that I once got the occasional dropout and audio engine stops even at 256 samples on Windows 10 RTM and previous Windows versions, and now I'm running at 128 without breaking a sweat. I wonder how much lower I can go?