I just installed the Golden Master on my SE (ie. what is going to be released to the public) and it's become as glitchy as hell. The Home Screen animations aren't smooth anymore. There's weird pauses, even when doing something simple like typing a text. Even opening folders is longer a smooth experience.
I've seen this sort of thing as iPhones age, but never quite so sudden. It's like they didn't bother at all to ensure that things continued to run smoothly on the SE -- even though it's still a phone Apple are selling.
It's grim and very disappointing![]()
I have had the exact same issues. When iOS 11 drops tomorrow I am going to delete the beta profile and re download iOS 11 and see if that helps. If not then via iTunes.