They stated during Blizzcon that they will be moving much of data from the DLLs into data that can be modded outside of DLLs. However, they did not state exactly what data. Both the owners of PoD and PD2 said that they would not be updating their mods for D2R, as much of what they had done, revolved around injecting those said DLLS for things such as server codes, which is something I highly doubt Blizzard will be converting to moddable data. Even single player mods like Plugy, inject the DLLs, which is why the future of that mod is in an uncertain place (which is why super important to get the full game into single player mode currently).