ACT with Writing?

I’m registered to take the ACT with Writing, but I read on the NU website that “Beginning in spring 2016 (when the new SAT is first administered), Northwestern will no longer require the Writing section of the ACT.”

As I’m a musician, the only other academic school I’m applying to is Rice, which notes that “Writing is optional.” Is there any need for me to take the writing section?

My daughters’ high school counselors told her class that if something is “optional” do it anyway especially for selective schools.