Stephen Gionta may be "killing" the team, but I think making JJ a 4th line player isn't in the team's long term interests yet. They want to see if JJ can be more than just a defensive specialist, which is why they sent him down to Albany instead of moving him to the 4th when getting Loktionov in there.
Winning as many regular season games as possible isn't really that important for a team like the Devils, they are a playoff team baring a goaltending collapse. They should be spending the regular season figuring out who their best players are and trying to develop their young talent. Once the playoffs start put the best lineup out there (If Loktionov proves he's better than Gionta, then he's probably going in). I think DeBoer feels that way. This guy put Gionta and Harrold into his lineup last postseason without any real experience because they were simply the best players available to him.
I think the best thing for "THE DEVILS" is to have JJ in albany getting offensive minutes but the best thing for winning games is to have him on the 4th. I say this having watched 5 minutes of Devils hockey this season but that's what it sounds like to me.