It can take them a few months to do their thing to the update, so they spent their time on 5.0, and they weren't going to dump all that work in the middle just because 5.0-5.0.2 have a memory leak and it was fixed in 5.1. People want new, not good. As long as they're seeing pushing out a new update, most customers are happy, and that's who they're worried about - most customers. The few of us who post here or on XDA wouldn't be paying them enough to stay in business for 2 hours.
Battery is definitely bad and quickly draining, but as i saw in the news all lollipop phone's have the same especially the s6 and Samsung pushed to them a minor update that fixes much of the problem,
Question is if we'll get it as well and when
If anything I'm seeing better battery life. I have been on battery for almost 6 hours with moderate use and I'm at 85%. I'm not using touch wiz. I use nova prime and I did clear the system cache right after the update.
Facebook
Twitter
Instagram