Yes, always put a single piece of functionality into a single PR. But submit an issue describing the feature before doing work on it, or you may be wasting someone’s time. Discussions here in the forum get lost.
I already have this added as metadata… upper_buffer and lower_buffer. I made my own lux sensors and have them reporting only after a 10% change, so I don’t use this any more. I really like when the lights respond to clouds rolling by.
I recently outlined another method for manual override in the Area Triggers topic. I don’t see a need to complicate things and anyone can implement their own custom actions.