I will admit I don't get the opportunity to watch many Storm games but you're more than likely right. There must be something about him to want the Tigers pay half a million for him. I've just never seen it in the games I have seen. I always rated Ryan Hoffman a much better player and Melbourne will easily fill the void by having him return next year.
Like yourself, I take an interest in stats sometimes and Blair's stats are weak compared to other edge forwards, stats don't always tell the story though.
You're right they don't, especially defensive stats, which is why Hoffman would seem as good a player as Blair because on paper he is - at least attacking on the edge.
The reason Blair is better than Hoffman is because unlike Hoffman, Blair can play prop with equal aplomb (a quality shared by Gallen and Thaiday) as well as the fact that Blair is a much better defender than Hoffman.
For his ability to defend one-on-one against so many different types of players - fullbacks, halfbacks, front-rowers - Adam Blair is probably the best in the game.
There are a couple of better attacking edge forwards going around - Mateo and Taylor - but those two have their weaknesses whereas Blair is the complete package. There's only really three forwards you could say that about (Blair, Thaiday, Gallen) which is why they're all on massive coin, and all mainstays of their international teams.