Yep, I tried full reset without restoring from backup. After a few months, it got back to the choppy and sloppy level of performance again, not even mentioning battery lasting a bit less than a day. Which was a dealbreaker to me, since dealing with battery anxiety is not fun. My current phone easily lasts me 1.5 days without charging, so even with very heavy usage, I am never worried that it won't last me through a full day.