The big problem is PS needs shinies for event mons with exclusive moves that are always shiny (genesect comes to mind), we may have others like that in the future. The rips are 10x as big in file size for sprites and for things like team preview it would break the browser size (they rae on average 2x bigger than the sprites).
So yeah we probably won't be doing it.
So yeah we probably won't be doing it.