So I have two things.
I have all my feeds in split view, and resizing the 2nd column (The feed stories) is not working. I don’t get the little 2-way arrow, when I hover over the column border.
EDIT: It does work, but you have to be pixel perfect with the mouse precision. Using a trackpad, it is VERY difficult to hit the column border right on the pixel. It would be nice if this area width could be extended a bit. I’m also assuming, that when people start getting 4K monitors, hitting the line exactly, will be almost impossible.
The options for switching views are not consistent. As you see in the image below, I think the split view icon should have the text “SPLIT” to the right of it, since it’s the only view with no descriptive text.