I hate my new phone. I could use the 4a with one hand comfortably, but that is not the case with the 8a. My thumb does not reach the top of the screen like before. I have to hold it in diagonal position just to be able to do the gestures Android -by design- expects.
The fingerprint sensor moved from the back to the front. That design helped having the phone in the right direction when taking it out of my pocket. Now it comes half of the time upside down. The fingerprint sensor is bad. Half of the time does not work and I have to use the pin. On the 4a was flawless.
Camera is better. Yes.