Complete opposite for me. Beta 1 was really solid for my Air 2. Beta 2 has led to App Store issues, accessory not supported issues (for Apple OEM chargers/cables) springboard crashing and more. None of these issues were present on Beta 1 for me.
Same for me.
On an iPhone 7+ here, animations are laggy, iTunes performance is bad, AirPods bug, when forwarding a song it takes up to 7 seconds before the next song starts, battery performance sucks, Apple maps seems to have received an update, but sent me to the middle of nowhere, iOS restarts....