JJ has played a lot like Neal light on the offensive side of things. His production has been decent though not exceptional. He is playing better defensively than given credit for, if only in supporting the D deep in the zone. He does not seem to be cheating up ice at least.
All that being said, a different type of player is needed with Malkin, either BB or Kunitz can do the job. So I'm hoping one of those two ends up there. Kunitz has more finish to his game, BB has more playmaking capability. But assuming BB can hold up physically, he was playing with an edge prior to the injury, and that should help that line.
We really need one more top 9 forward to make things really go. No matter how you shift things, you're one guy short.