@fribbledom I read man pages pretty much every day, and I’ve never felt they were missing any features. They are incredibly useful and effective for me.
As others have pointed out, many of the features you mentioned are already available. I’m the vast majority of Linux and Unix utilities or other programs that I have checked for man pages on over the years have decent ones written for them. I can’t think of a time when I’ve found that a man page did not exist for a Linux or Unix command.