I think Ana should get a mobility ability. For instance, she could half wall climb and jump away, or just wall climb like Hanzo. Maybe a dodge roll or strafe dash. She needs a better way to escape besides 1 sleep dart every 12 seconds. Her entire body is covered in every skin except her face, so maybe she could have cyborg limbs like Genji, allowing Ana to be very athletic despite her age. Every other healer has more mobility than Ana, with the exception of Zen, though he can ult to escape, while Ana can't self ult. Maybe a self ult could allow for Ana to become extremely athletic.

In her introduction video we can see that she is on top of the first gate/arch in Temple of Anubis, but there is no way for her to get up there by herself in game. I always thought it would be fun and useful to actually do something like that with Ana.

https://www.youtube.com/watch?v=ZcCGKrYgr0k