Yeah, XV is going to be extremely easy to mod due to the fact on how's it built. It has visual scripting, node based properties and you can freely edit the levels as they are just as in every other game engine. Cameras, actions are also not hardcoded, so everything is grabbed directly from files. That means a dedicated modder may be able to easily total convert the game to completely different genre. Unfortunately, file structures are ZLIB'bed + custom structure based on nodes, so we would need official modding tools for that.