I think the market for manuals is already a niche, im guessing no more than 10% of Focus buyers and that may be very optimistic. The percentage of THOSE drivers that would actually option self parking is probably very low, so it makes little sense for Ford to build them with self parking if they will sparsely sell. Remember, the Ti wasn't even considered for a manual until demand brought it later on, let alone a niche feature like that. I personally wouldnt care for it.
Maybe a new Poll...?