I'm disappointed by this change. The vertical layout is what made me buy. Every other notebook out there has this horizontal layout.
About the weekly layout. I'm not sure if such design is patented somewhere
How about doing it like the Moleskine's turntable planner (which unfortunately is retired years ago). Besides, your original vertical weekly layout are not ruled anyway. Those who need horizontal layout can just turn the book sideway.
Or, add timeline to the bottom of the horizontal layout, so it can be used as vertical like this (unfortunately also retired from next year's catalogue).
Although the first option would be better IMO (horizontal users turn the book sideway).
Vertical layout's strength is to see and compare the timeline side by side for the whole week.
Horizontal layout don't really need that.
The vertical weekly planner allows you to better see the overview of the week at a glance, seeing busy periods and free blocks of time, and therefore makes it easier when planning your week This is less obvious in a horizontal layout.
It was the preferred layout of Stephen Covey of "The 7 Habits of Highly Effective People" fame. It is certainly my preferred layout. Unfortunately different people have different needs, so it is difficult to please everyone with only one layout.
Damn. The vertical weekly planner layout was a major selling point for me.