It might be nice to have a veteran top-pairing defenseman that can be a leader on the team. If it's a fit, they can re-sign him. If it's not, he can be traded or let go with someone signed in free agency.
What (at least semi-realistic) return do you think would be ideal for Laine in terms of players? I'm not sure that the Blue Jackets need more draft picks, unless it's to trade for a quality player.
Personally, looking at the roster, I see a gaping hole on the blueline next to Werenski at the moment. If they can't bring in a veteran player like Roy, DeMelo or Tanev in free agency, getting a player like Ekblad or Pietrangelo as a stopgap until Jiricek is ready sounds perfectly fine to me.