It already does change user facing issues from the beginning, so that's not exactly new or something that hasn't been part of it before somehow. And I understand it's saving some battery, but it seems like likely not enough for that to qualify as Low Power Mode. It sounds like what you'd like is basically some sort of Variable Power Mode that you can configure how much it saves based on different pieces--nothing really wrong with that idea, it's just that it's not what Low Power Mode is, and that kind of level of customizability is historically not really something that Apple offers (that's not to say that's good, but just that's more or less how it's often been and is with iOS).