Joseph,
I could see this from the precipitating type / accumulation grid step onwards, as it might be easier to see neighbor grids rather than looking through all the Pot grids. However, at least the precipitating type step, if your SnowAmt and IceAccum are seamless, then that means your types, QPF and resultant Wx for p-types and intensity are consistent. What would be really cool is if I could keep updating Wx automatically after anytime Pot grids are updated, without the need for Step 6 to generate the Wx grid.