I don't want Barrie at all. Been one of the most overrated defensemen in the league for awhile now. Considering he's getting an awful contract in free agency, signing him could be one of the worst things Detroit could do. Thankfully I highly doubt he's interested in us at all.
Josi is okay but he's not as good as a lot of people think he is, especially in his own end, he'll get overpaid in free agency and I think Detroit should pass, even if he's somehow interested.
Pietrangelo definitely won't sign here, although he's very good. I expect him to extend with STL.
Muzzin I wouldn't mind either, but again, I don't think him signing here is realistic. Also, he's 30 right now and I'm wary about how much longer he's an effective player if we were to sign him. I think Toronto focuses on signing him personally and let Barrie walk.
Krug is the only "big fish" I can realistically see signing with here because of his Michigan connections, and even then, the Carlo/McAvoy bridge deals mean Boston has enough money to extend him potentially. So I'm not expecting him to sign with us, unfortunately.