spalted maple is less resonant, the punkyness definitely affects tone, its like part tone wood part sponge. I personally hate spalted maple, all I see is moldy wood, but its used quite often, because many people like it. Use as a thin top helps to make up for the lack of tonal quality and structural integrity, and the amount of super glue you generally need to wick into these things to make them stable would add to the weight unnecessarily if it were full-slab. you'll want the water-thin super glue If you like it, then awesome score! that stuff isn't cheap.