I do think that they can do all sorts of texture upgrades and add new light sources, but really, the biggest thing holding this game's visuals back is the "mud filter", that greenish-brown tint making everything look dull and desaturated compared to anything else outside of the game. With Gshade you can get rid of that and the game can already look amazing doing it. Looking at FFXVI I have hope they can make the colors look better since it uses the same engine, so I'm curious how the final product will look like.