I am making my first twister project, but wasn't happy with the plain edges. Your border using the scraps is perfect as well as a smart way to reduce the waste created by the cutting.
In response to the question about a pattern being outdated, I don't think any pattern will ever be passé as long as there are quilters coming into the hobby who want to learn new skills and improve their techniques by creating "classic" patterns. Every block pattern was new at some time and has been altered over the years, yet standards such as the log cabin will never go out of style, they will just be used differently or assembled in an easier way using all of the tools that are available today. Most important, they will always be made with love, and that will never go out of style.