I still think its just so they don't flat out give Morrow's spot to a rookie (Smith, once he gets here). Can't help but feel he either asked for it to try and protect his ego or they're trying to sell him as still injured.
Morrow may belong on the 4th line, but not if Burish takes his spot.
As in Morrow asked to be on the 4th line?
And I think it's pretty obvious, he's still injured.