Why not just hire a real writing team
Oh yeah the mythical good writers that exist somewhere. I've been 5 steps ahead of you years ago when I've started my anti-storyfaggot genocide crusade.
Typical writer who's out there on the job market has a literature degree of some kind. What kind of stuff is he being taught there you can figure out yourself. Typical recent, new published author, and that includes genre fiction is a woman in her late 20's to early 30's writing ultra woke slop(did you know about this trope-ridden story? How about it, but the MC is a lesbian?). Those who will want to adjust themselves to work with a game dev studio in multi-writer team are also on the lower end of the already abysmal quality there. Outside of them you will have gigantic problems finding people who's skill as a writer or an ability to deliver a finished script on time can be confirmed in any sort of objective manner.
This doesn't even touch the fact that you may pick up the most skilled and talented writer in the world but due to the particularities of a creative process you're not guaranteed good output, but again that's like me in 2016 writing anti-storyfaggot screeds all over this website and getting thrown into prosperland as a reward for telling the truth.