Actually, yes, it would be. He turns 25 this season, which is generally agreed as the age where a player really stops any sort of development. And there's no evidence whatsoever that Z has another level to reach. I get that he shows up in the odd game here and there and looks like a force, but more often than not we're seeing a guy with very limited upside.
Here's the thing, 1-on-1 I think he is very good. Where it really falls apart is when he has to cover more than one player, when he has to read the play and anticipate where the puck is going next. He doesn't really know enough to get in passing lanes to disrupt plays, or tie up the open man, or properly get in the way of shots. And it's because he's always having to react, because he's a step slow in that regard.
And it's because of all that that I think he's actually a very bad PK guy, even Nemeth was far superior in that regard. His mental game is as good as it's going to get. And this is totally discounting his penchant for dumb penalties, which simply can't be ignored.
I say this as a fan of Big Z. Not often you will find a guy with a hulking frame like that who can move that fast. I love the personality, THAT I will miss the most by far. And he really can change the tide of a game with a big hit or a big shot that finds its way into the net, but the Avs are simply not gonna pony up big $$$ for that when cap room is an issue going forward. Saying "well, someone may end up being stupid enough to trade for him later" is not sufficient grounds to overpay him.