Ok..... 36 hours later I'm starting to see some correlation. At home, on WiFi, phone runs cool, has impressive Battery life. Out and about in LTE, it's decent but phone gets warm, however, at work, where I live off of an ATT repeater network on 4G, phone gets very warm, if not borderline hot, and Battery plummets. Bad modem perhaps? Worth going to a store and swapping, or wait it out? This is the att variant for whatever that's worth. I've reinstalled insider, and am on latest build.
And also, I'm sure this is covered in another topic, but, my touch screen responsiveness seems to have some dull spots, particularly if I'm not holding the phone or otherwise touching it. Grounding issue perhaps? Shipping box was awfully beat up. I figure its either a it works or doesn't kind of thing.