I am hunting for a groups addon with a well designed UI/UX.
The currently available groups addon are not very friendly from UI/UX pov. If you ever decide to pursue Groups addon i can create a mock up in sketch and take others' input too to design an awesome product.
You might want to explore
1. AMS/Showcase/ Blogs by XenAddons (ready for XF1, XF2 under dev)
2. XenPorta for portal or this simple set up
Replicating through widget is possible... From the widget.. you can create a new one with different key though. If i understood you question right?
The only problem is as i suggested in page 2..... without restricting each widgets with its own forums or categories... it's going to show up the...
Thank you for the consideration
As for this, i know it won't be easy. So just like New Threads widgets has which Forums to choose from... may be your widget should have similar choices too, which i believe will be relatively easier as the logic has been implemented in core xenforo widgets...