Eh, the background story is already there, it doesn't need to be told again since most players already know the characters. Models are readily available, just need to send em back to the colorists. Plus I assume it's much simpler to drop a cameo in the story for short interactions/scenes with the MCs than it is to introduce a compelling and completely new character and build them up to fit within ORS.
I like Jessica personally. Good Jess is mostly harmless feel-good cameo as she turned into a well-adjusted person while Bad Jess has a potentially cool story arc to herself and Ian.