I assume they want us to mix within the plugin? That's great and all, but not everyone has Studio Drummer and it's nice to be able to have more freedom when mixing. I honestly do not understand why they have made this so difficult when every other drum program does this intuitively. In Studio Drummer, no matter how many new stereo or mono tracks I create within the software plugin, none of them become available in the Kontakt 5 drop down menu when selecting a new audio track input in Pro Tools.
In Battery, as seen here it's extremely easy to route individual drums out for mixing to a new track. To try and sum up what I think is going on, I'll compare Studio Drummer to NI's Battery 4 program.