If Saad goes the other way in a Faulk and Darling trade, you have to imagine more than just Hossa's contract is involved, because Hossa's deal isnt really hurting the hawks game like Bickells was.
If Saad is included, Carolina would definitely need to be including a another significant piece because Darlings value is negative right now, far more negative than Hossa's LTIR cap hit
Not true. Having Hossa on LTIR handicaps the team all season long. Sure they get to replace that 5m, but they do not get to use the benefit of any cap savings all season to acquire a player on a pro-rated contract at the TD.
For example, if a team is at 83m (80m cap) with Hossa on LTIR, (for the sake of argument they get to spend up to 85m) they still have 2m that they can spend on a player. However they can only acquire a player who's entire cap hit/AAV is 2m or less (or more if the other team retains, and some salary goes back).
However if a team is sitting 2m under the cap (78/80m) and they do so all season (23 man roster, zero roster movement, everyone healthy, etc), then at the TD, they could acquire a player who's cap hit is around 6-7m with zero retention and without sending out any salary.
Not the end of the world if you're a bottom feeder team, but for a team that has aspirations of challenging for another cup or two, that's a serious handicap. Why do you think Philly and Boston paid to move Pronger and Savard? Because while they're not massive issues, they are issues that limit the options a team has.