Could it work without Bill?
Let's say you step into a rabbit hole in your local diner which takes you back to 2012, so you hunt down JJ Abrams and James Franco and say "I can help you adapt this incredible Stephen King book, but we need to do it without expanding Bill Turcotte's role into that of a pesky sidekick."
How would it work? There is so much of Jake's journey silently narrated in the book - would you just ignore it for your adaptation? Would you add a voice over? Would James Franco talk to himself?
I didn't like the Bill character but I do wonder if this story could have been done on television without him.