Apple released iOS 11 beta 3 a few hours back as predicted some things we have discovered so far:
Disabling apps in the draw in messages seems to now work in beta 3
No longer have to swipe up for earlier notifications
Can now turn off Auto Play Videos in the App Store. Settings > iTunes & App Stores > Auto Play Videos
Blue echo speech bubbles are back
Apple has added a broadcasting option in the screen recording section however it doesn’t do anything at this point.