Thanks! I get what you mean, and I will definitely try to add something in the future, once I get this v2 stable. My take is that we want to have some sort of “idea tracking” utils: mind-maps, storyboards, moodboards, scratchpads or a combination of those.
About the tabs: v2 does not have split layout (yet?) but we do have full multi tab support and I thinks it is a huge step up: