XSVortex

I think the benefit of the single large slab has to do with the quality of the soil beneath the ride. If I remember correctly, Psyclone (and shockwave when it was there, for that matter) suffered from shifting soil under the ride that caused it to sink uneavenly. When weight is concentrated on individual footers, the weight of the entire ride is being placed on a number of small points (footers can also be poored deaper in hopes of hitting more solid ground, and also increases surface area of the footer). By pooring a large footer, they are probably spreading out the force of the weight of the coaster on a larger area and allowing it to "float" on the soft soil. This should allow it to hold up better over a longer period of time than past coasters in the area.