I haven’t had sound problems either. Had some flickering on the loading screen. Nothing serious though. I haven’t had connection problems. The first thing I tried was the USB-C on the case and later when I got the 6900XT on the card (the 3070 didn’t have a USB port). Both worked without any problems (other than the CTD’s - which may or may not be related). Last week I started experimenting with an USB hub and checking out which USB ports work and which don’t. That was the first time I discovered that not all ports work. The USB-A on the case (Corsair 4000D Airflow) however did and has given me some “stability” over the last few days. Fingers crossed 
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I’m curious if the new DX12 build will solve the stability problems (probably it’s not just one thing). I hope to sign up for the test program. In the mean time the XBOX version has been announced for July 27th. It must be ready and coming soon.