If a musical were adapted with success...it wouldn't be necessary for anyone to relate or refer to its predecessor.
I saw the movie once and did not remember much of it though while watching the musical this weekend I had several "oh yeah' moments that reminded me about some of the movie plot.
What might have made the movie work could have been the editing, visuals etc so when transferring it to its musical form something would need to step in that place so obviously musical numbers, lyrics, catchy tunes, dance numbers (if appropriate), scenery, etc
Unfortunately, for me, the musical did not have those replacements for me as I mentioned I left with not a tune in my head or any "WOW" moments. An 'oh yeah'...won't make it happen. I did not feel compelled to refer a friend to this show. I didn't think 'tickets to this show would make a worthwhile gift for my family.' Genuinely I feel bad for all involved because it is very clear that a lot of love, hard work, heart etc is being poured into the show (yes, for all shows so let's not get out the pitchforks and torches). I just don't believe this will find an audience. It's just 'there'.