HHuummm, User sort might be what I like. It doesn't matter too much if it is oldest on the top or newest. Just so they stay in the order I install them. Having the ability to do it either way would be nice, though.
Is the reading progress indicator in % of the book or does it show it 4/205 pages?
Does the pay version allow for the upper info bar that shows time and battery usage on your iPhone?
I see you already mentioned that it doesn't have the pinch move to change the size of the screen font. That's a very handy feature to have and I use it frequently so I agree that it would be a good addition.