Yeah after so much nice stuff with video settings its time to improve the audio part. I`m lucky, i have enough software & hardware but not everyone can afford the expensive stuff (and it was really expensive, you can build a nice highend gaming/enthusiast rig for that money), it will be nice to have the VST-host function (there are enough free/cheap plugins) so people can do more with the audio.
Most people who try to stream with multiple sources and more than 2-3 people are messing around with audio settings. This will help a bit, specially for people who are not familiar with professional audio gear or just dont have the money to actually get some.
And working with audio on a multichannel mixer or in a DAW is great, but this need some power and screen space (for the software) or some heavy cable management and space for a mixer, most people just dont want to mess around with all the cables... Even for me its a mess, condenser mic>preamp>audio interface>multiple outputs, like 30m cables just for the mic :-)