If I were to redesign this product I honestly would't redesign it all that much besides maybe put some attachments on the ends that make it easier to turn this piece of cloth into something completely different.
YangR always wants to know what to wear to be super casual (actually, pretty much every type does, that's just modern life for most of us). Something like this could work, though the super low rise of the jean would need some adjustment
An extra long sarong can be wrapped as a dress. My bet is that she is wearing two of the same sarong, one wrapped as a top ties at shoulder and the other as a skirt to achieve the fullness at the bottom. Love it!