I've had a bruised coccyx a few times, and it's taken quite a while to heal because unless I was sitting I'd forget about it, and when I sat, I aggravated it.

Do you have any medical reason for slow healing (like diabetes)?

The only other thing I can think of is using an inflatable or foam donut to sit on, reducing pressure/contact and allowing it to heal.

You can ask anything, but I doubt any responsible surgeon would cut without a valid medical reason.

Doc