Oooh I like that adaptation.
I gave the bag to my sis, so I didn't get to use it and haven't had time to make another. In that first pic, the strap didn't look very wide and I saw where the author said she had made it too long, so maybe the shorter version would be fine.
Since you're planning to knit a few, maybe try different variations. Everyone has their own preference and they are a pretty quick project.