Tanev is busted. This is worse than when Muzzin was clearly dead and you kept pencilling him in as our heavy usage shutdown guy. He turns 37 shortly after the start of next season. If he can play at all anymore, it's not in the heavies. Not without dying.
Carels is 18 and it's super fucking rare for an 18 yr old defender to crack a NHL lineup, nevermind be good. The list over the last ~20 yrs is Ekblad, Dahlin, Schaefer, or put another way, all #1's who were consensus #1 picks. Love me some Carels propaganda, but we're into baghdad bob territory here.
Dernferd might be good enough to make the jump to a depth role, but he's not jumping into a top 4 role on a NHL team unless that NHL team is intent on tanking.
and Rielly...my love for the man is well documented, but is he even a good top 4 defender anymore? I'm willing to give him a Berube mulligan because jesus christ is that guy bad, but he just turned 32 and that's usually damn close to the inflection point on a puck moving defender's downswing.
There is a guy who has scored a ppg clip this year while playing 23+ minutes a night for a 100+ elite nerdies team. Don't over think it.