hi, you can use grasshopper to basically merge the data for those polysurfaces. that is normally what I do if I have to panel out a polysurface. set parameter as brep or u can explode your poly into surfaces. and then extract whatever attributes u want for those surface.
once you have extracted the attributes you can combine the data just easy with Merge component. as it is now under a single list, you can assume now it is a single entity in which u can apply any operation (offset, etc etc)
the good thing is that you can change your poly surface in rhino and see your panel updates in real time.
hope that helps