I don't understand the point of signing Daley. If its only a 2 year deal on a reasonable cap hit, I guess they can deal him at the trade deadline this year when they are well outside the playoff chase. It seems like Campbell would make more sense- sign him for a year and flip him for a 3rd or 4th round pick at the deadline or something.
The only thing I can think of is, the way Khan is writing, it doesn't seem like they expect Kronwall to play much this year. Ericcsson too. Green will be traded by the deadline this season too. So they need bodies. If its only a 2 year deal, then negative damage would be minimal. Worse case is Daley's traded for a mid round pick at the deadline in 2019.