Why is it a waste? She actually learned and developed. Who fucking cares if she quit. Everybody knew she wouldn't remain faceless anyway.
The only show storyline that is a waste at this point is Dany's. She starts with the Dothraki, leaves/abandoned, goes around freeing cities, settles in Meereen. Leaves Meeren, ends up in Dothraki. Cities fall back into slavery. Dany heads back to Meereen. Again. At least now she has a larger army.