I wish Amazon would spend time improving the stock reader app rather than tweaking these other things. They should at the very least bring it up to the level of the Kindle for iOS app.

One of my major complaints is still the cheesy way in which you select text. The way in which this occurs in the KF makes it nearly impossible to accurately select text as it is very difficult to see where your finger is in relation to the text being selected. It should show the selection popup above your finger so you can see exactly what you are selecting, but it is shown in such a manner as to make it very difficult to easily select your desired text. Apple does this beautifully, not sure why the KF cannot. Also, don't dare move your finger a micron if you want to select a single word for the dictionary or else you will accidentally select a line or two. I prefer a double-tap method for selecting a single word as it is more accurate and not as easy to screw up.