You posting it here for everyone to download versus someone signing up for Google+ and going through the entire hassle of joining beta program just to download an app has literally exactly the same results. You'd be doing a lot of people a favor; not everyone wants Google+
You basically answered your own question. It's not needed anymore *because* we can now manually control ISO and shutter speed.
"Don't include features, people will complain. Include those features, people will complain."
Yes, this is true. They throttle you if you use a lot of data. I ran a speedtest with my coworker, also on Sprint Spark, his speeds were 5x faster than mine.
I don't understand why you can't just google the information you're looking for
Not only will it be faster but you'll probably get more accurate/less biased information too