I understand, I know Renpy is pretty big, so is SugarCube, and Twine, but what is lacking in these tools?
For example, I think Renpy is difficult for artists with no coding experience. It's difficult to start a project, and make a simple VN, it's intimidating at the very least. I also think the way you modify a scene, add characters, etc, isn't very intuitive using the GUI
I think Renpy works very well because it comes out of the box with some pretty vital features, like 'undo/back' and save/load just working, etc. I def. think those are 'minimal requirements' now a days, though some games may want to remove/reduce that a bit.
But I'm looking for new ideas, I'm ok with 'Twine has X, Renpy has Y, I want both together' type ideas too