I think ASP is more than capable as a PPQB. Not sure if he is as gifted in that role as say Lane Hutson has shown to be as a possession style QB, but having ASP's shooting threat from distance, and being able to walk the line and see the ice to my mind is just a different flavour of an effective PPQB.
The benefit of having both Willander and ASP on the powerplay, though, is it allows ASP to pinch up way higher on the halfwall to make plays, and stand "between the dots" for a point blank shooting threat, as Button loves to talk about on the TSN broadcast. It's an ideal spot for a guy like ASP--maybe Detroit will do the same in some schemes. It also allows the unit to rotate through coverage if Willander skates down the right halfwall while still having a D at the top, which is a good way to find more openings against better PK units (Sweden has had a pretty easy go of it so far.)
Last year when Lekkerimaki was on the U20 team, we saw ASP as the PPQB in Willander's current spot, and Lekkerimaki in ASP's spot as the shooter--and that worked great, too. Can't remember if Willander was on the 2nd unit or just PK duty only.