Pretty ignorant to award the worst pick in history to someone who has been hampered by injury. If that's fair than Nolan Patrick was obviously a way worse pick than Boucher. End of argument.
Patrick was expected to go top 3, so its not a bad pick, its just a pick that did not work out, largely due to injuries. That cannot be predicted with much accuracy, although injury history with Patrick was present, and kept him from being drafted #1.
Boucher was, to my knowledge, the biggest reach ever in the top 10. Reaches in the draft very seldom work out, and doing it in the top 10? That makes it such a bad pick because there is no excuse for it. Its very hard to predict injuries, but its very easy to predict players ranked mid second round stand a 50% chance of having much of an NHL career.
Thats on management though, not on Boucher. Boucher does not make the pick, management does. I'd base the rating of a pick based on information available at the time and how it works out, injuries aside. Its not like Boucher was setting the world on fire before injuries set in. Before the inuries his body of work was not too far off of a mid second round pick. Nothing before the draft screamed top 10, nothing after the draft and before injuries screamed top 10. It was simply a bad move by management.
I also believe if Boucher would have been drafted in the mid second, which was a relative consensuses position, he would not have been under nearly as much pressure as he has been and quite honestly may be in a better position today. He is carrying unwarranted expectations that only had a minuscule chance of being realized and that really has to drain a player mentally. I think he'd be seen in a much different light here if he was a second round pick, much like Ostaphuk. Personally I've generally evaluated him as I would any mid second rounder with some hope (50%) that after 4-6 years could be a useful bottom six player.
This pick reminds me so much of the Reinhart pick by NYI in 2012. Go far off board at #4 (consensus rank ~12) to grab an offensively limited player (by NHL standards) because he fit a size profile/style they wanted.