The Upload capability for repositories in TWX 8.4 can be greatly improved by
-supporting Drag&Drop file upload ("Drop here" zone)
-supporting Multi-File upload. When you have to upload multiple files, it is very tedious to click through menu->upload->browse->select->open->upload for each file individually (6 clicks per file).
To get an idea what I'd like to see, check dropzonejs.com which comes with an MIT license.