I thought it was really good. Definitely better than the second, and i can't figure out if I liked it better than the first or not. I think the problem with the second was they tried to make it too funny, but I still liked it. The third had the right mix of humor, action, and seriousness i think.
And on the Bootstrap thing, I think he's dead still but he's just not a monster anymore. If that's the case then they should've killed Elizabeth and brought her on the boat. Or they can just fill Will's shoes with water and he can walk around all he likes as long as he keeps his shoes on.