Seeking Notation Feedback

https://preview.redd.it/4v3qbqon8gye1.png?width=1598&format=png&auto=webp&s=be3dadeadd6624422307a2490c0a18cc6dcb4471

Hi.

I'm a composer, but I'm still learning about how to write for violin mindfully, and I was just looking for some expert opinions on the playability of this 2nd violins section. (Note it's an octave above treble clef)

The section is intentionally gritty and nasty, as is probably obvious.

I have used vibrato articulation because I wasn't sure how to communicate "Gradually increase vibrato" without cluttering the score.