Yes, in retrospect, Larry’s passing comes quite suddenly – his weak health & vulnerability surely needs to be accentuated earlier? – BUT this is precisely the immense value of storyboards ((& having the director self-storyboard his entire screenplay) – because it provides opportunity to spot shortcomings.
The storyboarded novel IS a working document, saving time/money, driving efficiency of production, sharing a vision and amending it on the fly. Etc.