I think any rational fan, of which there are very, very few this time of year, was hoping for a 1st round pick and expecting a 2nd round pick in return for someone who did his damnedest to inflate his trade value throughout the month leading up to the deadline.
In that sense, getting the latter plus a future 4th round pick for Marcus Johansson following the better part of two underwhelming, injury-plagued seasons after trading a 2nd and 3rd round pick for him isn't at all disappointing. Especially since it sets the Devils up pretty nicely to use their brand spankin' new abundance of assets to make a move similar to the one that brought him over from Washington.
On the other hand, in the sense that the team that gets to benefit from his appropriately priced services is the same one that rosters the walking, talking, licking bag of douche whose elbow intentionally derailed his tenure in New Jersey, this trade is somewhat disappointing. Especially since it's well within the realm of possibility that MoJo's worth could potentially be a lot higher, both personally in free agency or to the Devils at the deadline, if not for dealing with the difficulties from the following inexplicable cheap shot that kept him out of the lineup nursing a head injury for the second half of last season...
At the end of the day, the Devils didn't do right by Marcus Johansson. When he was actually healthy, one of the best passers/playmakers on the team wasn't often flanked by the pieces necessary to maximize his production. If that wasn't evident early in the season when he kept putting the puck on a pin but still couldn't buy a point then it was evident throughout the last few weeks during which his chemistry with Nico Hischier and Jesper Bratt was as palpable as it was statistically proven.
That said, the Boston Bruins somehow did even worse by him, as their resident rodent very well could have caused irreparable damage to his brain, never mind his career. Again, I don't think the trade is at all bad, but the taste it leaves in my mouth certainly is, as there is something about Brad Marchand now benefitting from said brain and said career that feels as dirty as his sliver of a snake-like conscience.
I have no doubt that Ray Shero got as much as he possibly could in making a more than fair deal, which is obviously all that really matters when flipping an asset. Unfortunately, I also have no doubt that Marcus Johansson will act with the upmost professionalism in letting bygones be bygones, which is obnoxiously annoying since the person that couldn't help but concuss him for no conceivable reason doesn't deserve the fucking courtesy.