Why do we wan't to bring another high penalty guy to Philly? Rinaldo couldn't get a shift in the playoffs for the same reason. It doesn't work in Philly. Even hard clean hits get you a penalty when in Orange and Black
If anyone were to add/overpay it's Vancouver, Simmonds is far more polished than Kassian.
Kassian has huge upside. I am actually doubtful that Vancouver would bite on this offer. It's not really a necessary move for either team anyway. After a certain point the FO has to settle on a group of core players and let them grow together. But Kassian is a very intriguing player.
Kassian has a higher ceiling but Simmonds is the better player by in large right now. Neither team does this deal. Flyers immediately get worse next year an Vancouver can't justify trading kassian after acquiring him for a very promising Hodgson. Then again, Vancouver may have traded Hodgson for Simmonds considering they did so for kassian, though kassian is quite a bit larger.