Most of them are moans from a designer's point of view that they can't force a particular layout on readers. One of the things I like is that everything looks the way I want it to look. Lots of paper books are spoiled by designers going wild or not really knowing how to design books properly.
The non-justification of some lines, I always assumed that was deliberate so that you didn't get too much space between words when there is a very long word at the line break. Hyphenation would probably fix it, but I'd rather have it like that than read lots of lines of text with hyphenated words at the end.