well... I did have the motivation of my paycheck to write like the boss. LOL.
That was wrong of them. For the "team" they needed to tone down theirs or step in and pump up yours, instead of expecting you, on short notice, to go to their level, it's not that hard to do for them. My guess is they weren't team thinkers. At the audio company we were all on the same page (except a few incredibly egotistical actors) and what mattered was giving the best we could to the audience and put our own egos to the side. The character of "Harry" was a working class private detective in the 1950's. We always made sure "correct" grammar was modified for that.
But I have found that I can get the rhythm of another writer sometimes when I've had to script doctor. I hate doing it but we would get a script once in a while where a scene was off and I could slip in and do it. But a whole script, I'm not so sure. I was lead in a group of 8 writers for a guy pitching a German TV show. I wrote the first script and then we all worked together to doctor each other's scripts so everything had the same voice through all the episodes (never did find out if he sold it) Anyway, Some of the writers I didn't have to change but a word or two, a couple other insisted on doing it their way and ended up being completely rewritten.
In a group situation the best carry the ones who need help, they don't abandon them they don't expect them to rise a level on short notice, they're their to provide the building blocks and help everyone climb. Boy, just hearing about that ticks me off. How unprofessional.
You tried, they didn't look at the big picture. So sorry.