ZeNiT

Sorry to hear that, a pretty big overhaul is coming to QoS though that's likely to be in 4.0 so would be interested to see your experience with that. If you were having local congestion then QoS would definitely help you

We don't give out any ETAs but it would likely be sometime early next year, we may run a beta before that but it's still being worked on so timeline is not set in stone at the moment. 
Try setting Congestion Control to never, disable DumaOS Classified Games and add your device to Traffic Prioritization with the Games Console service instead and see if that is better.

Not sure, we found a bug while testing it so the devs are currently working on fixing that now. Once that's done we'll re-test it. After that, it'll go out to beta testers first before we can fully release it.

It shall be revealed soon but a lot of stability improvements!

We've been working super hard and are now testing new firmware, it shouldn't be too much longer before we can release one!