I love Eddie Kaspbrak
I loved all his scenes in the book, miniseries and now this movie, as he is my favourite of the Losers, because of his vulnerability and because I like the actors portraying him.
The Leper scene was scary as fuck because of his fear of infection, but I think the scene he was actually in danger of being eaten by IT was when they were in the Well House and IT scared him with the Leper once again and he fell through the hole in the floor and broke his arm, then lost consciousness. IT could've had him there and then, but it was too busy with Richie and Bill upstairs, so he was lucky.
I also liked the following scene where they reset his arm and he's raging at them not to do it, but they do anyway. The emoting in the actor was awesome. Same when he stands up to his mother, and in the final fight when he's raging again and itching for a fight with Pennywise, and that's after he's been sprayed in the face with the black gunk by the Pennywise Leper and he yells "I'LL FUCKING KILL YOU!!" before kicking Pennywise in the head.
He may be vulnerable, especially with his arm in a cast, but he certainly has courage!
EDIT: Come to think of it, he was awesome in the miniseries as well, inflicting damage to Pennywise with his inhaler, yelling "This is battery acid, you slime!", and Pennywise believed him.