Bs”d
Why didn’t Chazal initially institute the concept of mehadrin which is to change the amount of candles being lit each day? The truth is for the essence of פירסומי ניסא one candle a day is sufficient to proclaim the great miracle. Regarding the eight days of Chanukah, each day has its own significance and greatness. The changing of the amount of candles each day is to bring to our attention to focus on each day–that each day is a יום טוב בפני עצמו, to be inspired, to be enlightened and to be motivated to come close to Hashem. Use it, use it, use it.
A freilichen Chanukah.