Concept full of drama but it sounds like a documentary logline rather than a feature. Who’s the main character/protagonist? Even if it’s an ensemble piece, I think you need to be specific about the lead role.
Alcoholism is causing the family to unravel. Who is the alcoholic? Are they all alcoholics? What about the alcoholism is causing them to unravel? Are the parents breaking up? Are the kids drinking and skipping school? Are the kids going to be taken off the parents? So many possibilities and I guess you know the specifics as you’ve already written the screenplay. I think you need to include some those specifics so it’s clear what the main conflict is in the story. For example, is it a conflict within the family, or external against some outside force, like social services?
One more thing. The first half of the logline states that ‘a family living in Hawaii unravels from alcoholism’. I think that this implies that the story will be exposing Hawaii’s underside without you having to include that fact in the logline, giving you room to include other key details.