First off all the sonoff L1 is a great product. But there are missing functions.
1* wake up light . (Sunset) (Sunrise) mode .
2* Add a motion sensor . When sensor detect set light on full . After x min to 30% of turn off.
Maybe better to develop a wifi motion sensor die sonoff. A small one ( the pir 2 is muts to big)
3* basic color picker.
There are producs online that cost the same as the sonoff and do the same with the above.