No on both trades.

seems like kind of a lot to give up just to add a mediocre third line winger on a mediocre contract. This could very well make the team worse, while giving up important futures, all to gain cap space that you don't use.

Detroit doesn't have the cap to take on David Backes $6 million, Besides i doubt he'd waive his NMC to go there as bad as they're playing.

Try this: Pens retain salary on the Bjugstad deal, he plays on the second line.
The Backes deal is with Minnesota instead and you take out Cam Hughes (still for two nobodies maybe a 4th liner)

If you do those two things, both trades are fair, the dump team has space, and the bruins don't get screwed.