PKing is what you make players do who have little else to offer. Its why Andersson, Miller, and Glendening stuck around at the NHL level to begin with. The difference is, all the others provide (or have provided, in Miller's case) other attributes. In 200 NHL games, Andersson hasn't and doesn't. Ferraro is already showing that he is a more complete player and is already trusted by his coach.
Assuming Weiss is replaced with Pulkkinen, that leaves one spot for a bottom sixer. At this rate, its going to be Ferraro.