Few issues I've noticed since last night...
- Cellular service dots/bars seem to fluctuate...A LOT. My iPhone 5S stayed at full bars here in my house, but the 6+ seems to fluctuate from 3-5 bars while sitting in the same exact place. Service itself doesn't seem to be effected, and I checked speeds on LTE and they seemed the same weather at 5 bars or 3 bars, but it's weird that it changes like that so much.
- Battery life is no where near as "good" as some people were claiming. It's not bad, not any worse than what I experienced with my 5S, but it's certainly not dramatically better.
- Safari seems to have some issues switching from vertical mode to landscape mode in certain conditions...I was on ESPN today and it took sometimes 1-2 seconds for the screen to switch between the two modes where as the 5S seemed to do it instantaneously.
- Notification Center seems to get the "Unable to Load" screen a lot with the widgets...I don't plan to use these often honestly, but it's a little weird. I think The Weather Channels widget has worked maybe 30% of the time.