What are your camera settings? How do you snap a photo; home key or touching the screen? How full was your battery? Did you do a factory reset after the lollipop update?
Camera settings are the default. I can't use the highest settings since the update. I tap the camera icon. Battery was fully charged. I have done several factory resets (with and without app restore) and it's always the same: slow, clunky animations, unresponsive, and always hot now.