That's the question isn't it.

In my opinion his attributes as a goalkeeper would have been what Notts would have needed. He's played at various levels & his game is supported by having good agility & composure, with ability to command his area.

Experience:

At 31 years old, he has a lot of experience playing as a goalkeeper. 

Physical attributes:

He is known for being a tall and strong goalkeeper with good agility and balance. 

Playing style:

Blackman is described as being a solid, confident, and dominant goalkeeper, particularly in the air. 

The question is. Would he have been an improvement in the goalkeeping department? I would have said yes to that

It’s strange that just about everyone you talk to can see that the goalkeeping department needs to be strengthened except the people that matter. Hopefully the new DoF will quickly identify the problem and set about rectifying it.

I don’t think the club will openly say they are looking for a free-agent goalkeeper because that would basically do it for Roos’ confidence and he’s not exactly full of it at the moment. But that doesn’t mean behind the scenes they aren’t looking into it.

I’m also not sure Blackman would’ve been the answer, the fact Shrewsbury had him and were heading into League 2 but chose not to keep him isn’t a great vote of confidence. A quick glance at the that stats do show he's good when it comes to dealing with high balls in the box, the rest of his stats aren't anything special though and I’ve not seen enough of him playing to know how good (or bad) he really is.

Roos has definitely made some mistakes, I think his shot stopping is fine but his biggest weakest in dealing with set-pieces is (and already has been) exploited in League 2. He’s got to start showing some improvements in this area or he will be replaced at some point.