Thanks for your feedback!
Let me first of all explain again what the purpose of the multicolumn layout is: if the lines are too long, it's pretty hard to read. Using a multicolumn layout shortens the lines. The intention is not to change anything concerning scrolling/paging, this works as before by vertical scrolling or vertical paging (page up/down keys on the keyboard).
I understand that some don't like the serpentine reading (read column 1 to the bottom and then go up to the beginning of column 2), maybe because they expected that it works different like in readers known from the iPad or they just find it hard to use. But page simulation/vertical scrolling is a different story. This brings in a new complexity concerning rendering and navigation.
For now I start with the "simple" multicolumn layout and will see which feedback I'll get when the new version is available to everybody. Perhaps I'll add vertical scrolling or something like that in one of the next versions but right now I don't promise it
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