Personally, I am not concerned about Teddy leaving. The upside of Taysom Hill is what I think the correct play is for the organization, and quite honestly I would literally never fear Teddy Bridgewater at QB if he signed with a common opponent or divisional opponent of ours.
I really like the guy as a person and think he is a good backup, but as a starting QB, he is a game manager and not someone that will "win" a game for you, but will at best "not lose" the game for you. Big difference.
I feel like a lot of people see backup QB went 5-0 and think it means he must be great. But for those watching the games closely, they know Teddy isn't why the Saints went 5-0.
I know many people will point to a couple of his more-decent games, or that one time he threw for 300 yards that I can remember off-hand, but a lot of that production was off of an excellent screen game, dump-offs, and/or passes to literally the best WR in football, with a game plan tailored by arguably the best schemer and play-caller in football, versus what I believe was a statistically porous pass defense with an injury or two.
So if he signs with Carolina, so be it. I'd be more than happy with facing Teddy twice a year.