I'm with the writer of the second article, as some may have noted already in some of my previous posts. I choose my fonts, sizes and settings for a very specific reason. That reason is having a very bad eyesight, but still wanting as much text on screen as possible. Therefore, I prefer fonts that I can still read very well, despite choosing a quite small setting and somewhat thight line spacing.
If your book denies me that because you insist that I should use your crappy font at size 5 and lock the font selection, then I'll kill it with fire, rip the font out, or convert the book to a format without embedded fonts.
Getting to choose my own font is one of my main, maybe even *THE* reason to use an e-reader. Respect that, thank you very much.