[Anak]

@taming.
Yes, I'm glad that Kobo takes an ative role or participation to turn the epub3 standard into full epub3 rendering engine (like Readium) and tries to keep it as open (not meaning open source) or light (in the case of lightweight drm) as possible. I appreciate the efforts Kobo is taken towards the epub3 standard and is worth (and fair) to mention here.

But their implementation on there devices they add some unnecessery things to the standard (epub2, epub3). E.g. like a fixed bottom margin after each paragraph.
Which shouldn't be there. They aren't there in paperbooks. And not really essential to improve readability on digital devices (in most cases I would say, to the contrary). But if Kobo wants this "feature", they should have added (should change this to) a top and bottom padding option to the font settings menu (like the left/right margin setting) to adjust the space between paragraphs. This padding feature is relative easy to add. It improves both flexibility and user experience as the user can adjust it to his/her own prefered setting.

The perfect device doesn't exist. But by keeping options optional it can be almost become near perfect.