in comments they are talking about this platform relieving jams in Miasto which is untrue because all of the trains stopping at Przedmieście will stop at Miasto, and iirc trains on this line do not cross in Miasto
also freight trains have a track less at Przedmieście now
just for the record, this line should have 550mm high platforms because of stock running on it, but cheaping out on PIS at a city station is kind of counterproductive