It's probably pretty close to fair. Maybe the 3rd becomes a 2nd (a late 2nd, maybe the WSH pick from DET, but I don't think so). CAR's pick is going to be toward the bottom of the 1st. They drop 30-40 spots for a guy they control (RFA), who needs a legitimate C (Fil isn't cutting it) and fills a legitimate need (middle 6 F). They would roll 3 lines of danger, which is what they would need to counter BOS, TBL, or TOR in the East.
CAR would have to figure out a way to pay him afterwards, but they could shift Haula and McGinn's money.