What if this character does this, rather than that?
How will the story change if I remove this character?
Will the story be better if I introduce this character or group of characters much earlier on?
What if I use the 3rd Act as the opening instead?
What if I change the sex or age of my protagonist?
What if I change the goals these characters are trying to achieve?
Just because you've written it on the page, doesn't mean it has to stay that way.
Good thing about words, they can be
Don't settle for that 1st draft.
Keep developing the characters.