I re-read what I wrote and realize it was kind of useless. I didn't mean to insult your question or make it sound dumb. Just, universally, it's important to understand the options and advantages of each Dash Dance. DD is a skill, players are better at it than others. It's important to work on it, and this is a good good question because it shows you're trying to develop a deeper understanding of DD fundamentals.
Even though the majority dislike Sheik's DD, their are ways to use it for a benefit. Although it may not reap as much of a benefit as like Fox's, it's still important to simply understand it's value for what it is, not necessarily compare it
Again, sorry if I came off as a jerk, I think it was a great question. I know I still didn't answer it, but that's because I wanted to answer it in my own way. more in depth, and less like a jerk.~