Pretty nice destruction there! In terms of what else to put in, I can only recommend sub-levels of beams and hull layers and such. Decking would have sub-textures of isogrids and reinforcing bars and conduits. One thing I try to tell modelers and VFX people is that not everything would be burnt black; not everything breaks down into carbon and soot and whatnot. Alloys melt but they don't all turn black. Play with some other metallic and oxide shades. But most importantly, have fun with it.