The contour plot element is now available in Graph Builder, which (through the 'X Group' and 'Y Group' slots, for example) gives many more layout options 'out of the box' than does the Contour Plot platform itself. For example, by dragging and dropping, you can produces a trellis plot by wafer and lot, and then save the resulting script.
From memory, though, there are a few contour options not in Graph Builder, and if you need these you need to stick with what you have. Other layouts are certainly possible, but would require just a little JSL.