Not to mention she was basically just a random passerby that added little to the story other than hinting at a later movie. I wouldn't even call it building a universe. It's not Martian Manhunter level useless, but like that, I can see why it was cut.
I like the comics version of Iris the most I think. The Arrowverse Iris and chemistry with Barry was nice but later on just like the rest of the Arrowverse in general she just falls apart and off the rails.
I don’t understand why the ZSJL version of Iris is here as an option since she’s only been in one scene so far