Ok, I stand corrected. Half the people feel that he is nothing but a fringe 4th liner.
And that's fine. We've had the same debate about whether Stepan was a real number one, whether Zibanejad was a "real" 1C or fringe 1C, Hayes a legitimate 2C or more of a really good 3C, what Vesey or Namestnikov are, is Fast better than a 4RW, etc.
The issue is those guys have much longer track records. Nieves, the team has to decide if he's worth keeping around based on a lot less. Honestly if they can get him on a one-year deal for whatever the buriable max is, or less, I really don't see any downside. You let him try to solidify a spot on the fourth line and if he can't, you waive him and then he's a good player for Hartford.
He's lost a lot of time due to the concussions. Probably a year total since turning pro. That's always going to be a concern with him. But again if you get him for cheap, I don't see a lot of downside. And even if he is a "fringe" 4C/4LW, what's the plan to replace him? There ARE 4th line bargains to find, as I've shown in my criticisms of McLeod, but they're not always easy to find and sign. A lot of times you have to pay a decent little chunk of change for a good 4C, and then given their somewhat limited abilities, even a slight decline generally makes them useless.
So for me, until someone like Fontaine shows he's ready, it's not a bad idea to keep around Boo.