Really I think it would depend on who was available
If the Bruins say ended up with the 3rd pick and Murphy and Larsson went 1 & 2 (Hey Cherry thinks Murphy is #1), then I think you have to take BPA.
I think if it is close they will take a defenseman. But I think if they are in a scenario where the 3rd and 5th best players on their board are available and they are forwards, and the best defenseman available they ranks as the 12th best player they will take the forward ( or possibly deal)
If you have the 3rd and 4th best player on your board available, and #3 is a forwasrd, and #4 is a defenseman then you take the defenseman.
I just don't believe that they would pass up a Landeskog to draft Musil, unless of course Musil does something in the next 4 months to really put all his tools together and put together a long stretch of consistent dominant hockey