EDIT: I agree with OP in that it would be super nice to have a “Listen bus” functionality in Renoise without all these unnecessarily complicated steps. I didn’t realise this was in “Ideas & suggestions” when I wrote my original posts. I also edited some slightly off-topic rambling out.
Although it’s unnecessarily hacky to setup, this can already be done in Renoise. Check out this thread for a full how to:
You can also make a number of native utilities for listening through different FXs or correction curves. You can make utilities for mono monitoring, swapping the L and R channels, soloing the mid signal, soloing the side signal, emulating a “NS-10” type frequency response etc. Lot of possibilities with just the native stuff.
You also really don’t necessarily need (though I understand how handy they can be) any room/headphone correction plugins with renoise, the convolver device can be used as a perfectly functional room/headphone correction EQ. I used to use the renoise convolver device with a tilt EQ (for house curve) wrapped in a doofer for my room and headphone corrections. And it was placed in a separate “listening bus” too, so there never was any possibility of accidentally rendering the track through the room/headphone correction. I have since turned to using VoiceMeeter and EQ APO due to it being a system wide solution and making life a lot simpler in many areas.
I hope this helps until there’s a simpler solution! Happy tracking! 
