Gaming problems never go away for some people, all I can say is Win10 has been fine for me in gaming with regards to sound etc, problem with gaming is there will always be problems with some gamers, these sort of things are hard to fix, because you can't get every gamer with 100% stability with no issues. I would be lying if I said I never had any gaming/audio issues on any of my Windows Operating Systems I have owned. There still a bug sometimes in Mass Effect 3 multi-play where audio goes silent, do I blame Windows, drivers or the game? (game IMHO)..Point is there are bugs in everything ie games,OS,drivers etc ,that's why you get new updated drivers for bugs fixes and improvements, same goes for Windows updates, but you will never catch them all or new ones will appear, as you are aware even with new updates it can break something old.
End of the day not much you can do apart from report your valid issues you to have to Microsoft and hope for the best ie possible fix or solution (yes I know I keep saying that). Just remember no OS is perfect just like users ie some will have issues regardless of right or wrong.
Btw latency issues are nothing new, remember the old USB latency issues? I do. You can bet some new issue will pop up down the road.
We can all moan and bitch about it, but only Microsoft can fix them. Be patient and hope for the best is all you can do (apart from reporting it that I'm sure you have).
Right I 'm off to game online .
My point is these issues are not new and seemingly not getting any better and often crop up for people after a Windows update - so the approach to updates in 10 just makes these issues more frustrating.