I do think Hutton is clearly the best candidate to be the "Ehrhoff" in a more conventional Sedin-setup.
I'm still not sure he's got the same finesse for pulling pucks off the wall and making the right decisions quickly there, in what amounts to an often very compressed space/time window.
But few really do, Ehrhoff was fantastic at that.
The problem with Eriksson, and it was noted before he even signed here...as you can see in those Bruins PP goal examples - he's around the net, but he's shaded to the RW side. Where pucks are coming into his body, rather than across it. Which doesn't really work well with the Sedins, as they do their best work when working off that same wall.
As amazing as the Twins can be on the PP - it's always limited the ways you can effectively set up the PP when those two obviously form the core of the top unit, and are not particularly versatile on the PP. The experiment trying to get them to set up their cycle on the LW boards was an abject failure.
Neither of them really works well as a traditional lone QB distributing the puck from the point, and neither of them really presents a credible long-range shooting threat from the point either. So you're pretty much locked in to queuing your setup off the two of them working the RW wall on down to behind the net. And it's tough to draw up an effective PP setup with 3 guys all posted up down low in that RW corner.