Hi! I just started experimenting with this integration and so far I like what I see!
One improvement that I see is that it would be great for organization, if the different Battery Consumption entities where linked/tied directly to the Device in question. Kind of like how Battery Notes has done it. Then you could have all relevant entities in the same place. Not only the actual Device and it's regular battery entity, but also the consumption template and utility sensors.
Could this be something that you want to take a look at?