He is available if they can't sign him by tomorrow. They aren't a contender and have some good AHL d they want to give ice time too and if Carrier decides he isn't part of the future, they want to get some assets for him. The playoffs are just about experience for them, winning a cup isn't their goal this year so if Carrier isn't part of the future, get a pick. Same thing Philly did with Walker.
Yep, he ADDED everything he could. Tomorrow will be about upgrading certain players (Ceci, Foegele)
Edit: Now I honestly don't believe anything else will be added. Lots of teams looking for similar things and I am not 1000% convinced Carrier or Eberle WILL move. But I do like that Holland is clearly still looking.