Only 3 retention slots per team and the Flames have much bigger pieces to use those retention slots on then a #5 Dman.
If they do end up unloading a bunch of UFAs, Tanev, Lindholm, Hanifin at least will use those retention slots.
He's a #5 Dman that can play spot duty in the Top 4 but if he's playing top 4 minutes for you regularly, you aren't going to go very far.
Which to be fair is still a decent player, just need to make sure he's used properly and not playing above what he's capable of.
I'd have concerns in Vancouver about him playing too much if he's penciled into the 2nd pairing.
I don't think the Canucks need him to be a top 4 guy, at least not in the normal sense, but I agree it's not like the Canucks all of a sudden have a top 10 d-core.
They have a #1 in Hughes, a #2 in Hronek, and then a bunch of 4/5 guys filling out the rest of the D-core in Soucy, Myers, Cole, and Z. Which adds up to 2 below average 2nd pairs or 2 above average third pairs unless they split up Hughes and Hronek more often.
Tocchet is seems more concerned with managing TOI vs having set pairings. Z gives them the flexibility to spread out the minutes more evenly. Cole and Myers have been great this year, but are showing signs of wear.