Cpt. Nemo 说:
While I have no idea what exactly it would take to allow downloading mods on consoles, I can tell you a couple reasons why it likely isn't worth attempting. Please bear in mind i'm just a forum moderator, and I don't have access to any other information than what's posted here.
1. Size Limits
Both the PS4 and the Xbox One have limits on the total size of downloaded mods, with Skyrim Special Edition currently having the largest limits, with the XBONE at 5 gigabytes and the PS4 at a miniscule 2 gigabytes. This is a problem when you consider that Floris, easily the most popular mod for Warband, is 1.26 GB for the absolute bare bones version, and the other 2 versions are both over 2 gigabytes.
2. Permissions
For a mod to be uploaded, either the modders that made it must do it themselves, or give their permission for someone else to do it. Some modders don't even want their creations on Steam, so I can only imagine what those modders would say to putting them up on consoles. Even worse, some mod creators are difficult if not impossible to contact, so getting them to make their mods available or give permission for others to do so cannot happen.
