Agreed - he occasionally plucks some strong marks but he's probably similar to Stringer and Crameri in that regard.
I think he's more of a leading forward who plays closer to goal.
The reality is we wouldn't be getting him with an intention of getting 40 goals out of him. We have a severe lack of depth, particularly in the forward half and it's been proven you need role players. We forget he is a Premiership player, meaning that he was able to fulfil a role for one of the best sides of the modern era.
He does have some flexibility in that he can go down back - not the greatest defender, but he would have got plenty of games with us this season given our injuries.
IIRC he's a free agent so we wouldn't need to cough up anything. He's 26 with good skills, there's definitely merit in entertaining the idea.
As for Cloke, I think he should retire. Played well v Port but not in the way a key forward should/typically does and he's not going to have many games where he's roving packs to kick goals. He's barely taken a mark all year.
Crameri is an interesting one. Originally I was surprised at the talk of letting him go, but 2 years out of the game is a long time and there have been questions over his application.