It'll be difficult to make a brand new FD and get it ready to the standard for worlds (remember they have italian nationals coming up, then europeans. Not a lot of time to do a whole program). I suppose its possible to go back to an old program... but I think that could see equal criticism.
Either way, I'm glad they changed the StSq, so maybe they'll tweak it to the point of becoming a stronger program.
Really, I think this season was an experiment that wasn't successful, and they will do their best to salvage it and take all the feedback going into the Olympic season (where hopefully they'll choose material that will suit them better).