I find inability to record/screenshot (both audio and pictures) the most annoying. They actively broke call recording because "what if it's illegal", then published their own call recorder, but only in India, or something like that.
If I have something on screen I always can take a picture with another camera, creating obstacles doesn't add privacy, it only serves to deter the laziest of bad actors and actual fair users
The hard part is "that add value". Not only it's hard to measure, but highly depends on scope of what is done