It's not exactly common for an organization to actively attempt to mitigate the negative aspects of middle management so it's almost an apples to oranges comparison. But since we're on the topic of Google, maybe making management reduction one of an organization's goals is the correct strategy to reduce the bloat and increase the productivity of ICs.
IMHO this is really the point. Somebody has to hire devs, run the evaluation/promotion stuff, facilitate communication to/from upper management, and so on.
I've just never been to a place that couldn't do that with 1/2 to 1/3 of the EMs they have. For whatever reason the standard is one EM per team. A better ratio is on EM per 2-4 teams.
And that illustrates what releasing half-baked stuff and not caring much about tech debt is all about - visibility. This seems to be true across industries. Not releasing something, even if it's not ready gives impression of not doing enough, not delivering, always being late, etc. Releasing stuff shows you (the manager) are the person who delivers. If it's crap, you'll get even more resources to throw at fixing stuff that's already delivered. And you're the hero again (even if it's "techies" who did 80-hour weeks to make it happen).
This doesn't even break down too much in physical product world. "Deliver" could mean sales, first to the market, we'll add copy&paste in 3.0, and so on...
Meanwhile, I have no idea if battery life impact is worth measuring in your use-case. My assumption would be "no" because I would imagine the battery life impact would vary too widely to yield useful data and I don't see what I could do with that information anyway other than recommend some people not use the app. But I'm not really thinking deeply about it now, so I'd love to be enlightened. Meanwhile, trying to get more customers is a good thing, even if it fails.