I updated it a little by making the shapes overlap. I am going to talk below about "feather in" and "feather out" designs. The extra feather is on the left below.
Then I put it in front of my mirrors to see what happened.
Eight repetitions seems like too much.
5-fold symmetry is nice.
4-fold symmetry with the extra feather in. I like it.
4-fold symmetry with the extra feather out. It was better with the feather in.
5-fold symmetry with the feather out. I liked it better with the feather in.
Mirroring with the feather out. Could be interesting in repeated strips? I like the feather in as show below that the feather out.
Now I have a lot of possibilities to decide on!