Do you usually change the traits of the premade sims if there is one you cannot handle?

All comments here are really insightful.

Let her play what she wants or you can send her to that submarine bath. They spend the whole day in the bathtub.
Hmmm maybe it's a bad idea if your sims are eco friendly.

Another possibility is to buy her the costume chest and a tree house (maybe the castle one) and send her away when she annoys you.
"Go to the tree house Palmira and don't throw water on me!"