I'm not 100% sure if I'm answering the right question, but you can actually move the camera around once in gpose, if you are looking to have something off-center or from a wider shot, etc.

You can use the normal movement keys (W A S D) in combination with your mouse to change the position of your character as well as angles. It's a wee bit clunky (IMO), but it does work eventually

If that's not what you're asking, sorry!

To add to /gpose requests, I'd like to be able to turn their actual heads once in /gpose. As of now, it snaps your head in the direction you entered into /gpose with, and that's the angle you're stuck with.