I had to google it to find out what it was. It is usually a good idea to provide a link
https://www.jinnybeyer.com/ax_commer...1D3185DE2E8CE9
Inset seams are also known as Y seams. They are called this because you have 3 seams coming together in an intersection forming a Y. You can't sew into your seam allowance where the 3 pieces intersect. You can google it to see what all is involved, there are many tutorials and you tube videos out there. Many people shy away from them but they are a great skill set to have in your quilting arsenal as many patterns use them. There would be no way to get away from Y seam (inset seams) with this pattern.
IMHO what makes this pattern so striking is the color gradations that Jinny Beyer is famous for. I think if you did it scrappy it would lose its visual impact and would just look like a hodgepodge of strips sewn together, unless you carefully chose your fabrics to be in the same color families and gradate like Jinny has done in her sample.