What I would've changed based on the casting
There was so much unresolved sexual tension between Hel and Camero and those actresses had such great chemistry. Camero and Trixie also had a good chemistry and the only two that I didn't really think would fit together suddenly hooked up; Trixie and Hel.
I was so hoping and expecting that Camero and Hel would turn out to be a couple. I know they kissed and there was some subtext but the Trixie/Hel storyline kind of ruined that. I know the entire movie was unrealistic but that storyline was just lazy.
I would've changed the script, Camero and Hel a couple or at least hooking up regularly, Camero 'cheating' on Hel with Trixie in the trailer. Hel walking in on them and flipping her *beep* leading to Camero flipping her *beep*. Something like that.
It may sound silly but chemistry between actors is very important imo.