I don't agree with you. I've moved from stock to this ROM and the battery life is comparable, using the same apps in the same style.
In my opinion the battery life is good.
Confirmed by me, battery life as good as oreo stock,
Any pie compatibility in the works mate? Have used your kernels in the past and they are great would love to get it on the pixel experience pie rom
Flashed this kernel on pixel experience, so far no issue found