The problem with restricting modding to textures and data only pretty much guarantees a short lifespan for the game being modded, at least in terms of player community. The more moddable a game is, the longer people will play it. I think in most cases, if we want to support modding in our games, we’re going to have to come up with our own ways of enabling it, such as providing custom, external level editors.
If what i’ve seen in another thread is any indication, we’ll be getting .Lua scripting eventually, so that should make it easier, though i prefer to work with .xmls, though i’m not really sure how to use them in the engine,