Hi,
It won't be practical to support scrolling and diced sprites - it would just end up being far too complicated to be useful. Even scrolling a subUv image with normal sprites means actually storing much more than one "tile" of data to avoid having to create more and more polygons (you will still need to create exactly the right number of polygons split so each "tile" is covered by one polygon).
Its not impossible, but will require a lot of dynamic allocations and tessellation, something which is effectively going against the grain of efficiency.