I prefer a dedicated quick entry to be honest.
I can't quite express what it is that I have trouble with... Neither the Inbox or the Project outline quite work for me, when it comes to capturing thoughts.
When a thought occurs, I want to capture it with as little mouse clicks and key strokes as possible, and I want the information not to clutter project view. I feel like, right now, I need an extra click to capture the data (Create button up top) which goes into the Project view, which clutters the project view.
When I go to the Inbox view, I have a list of items I captured, but to update any of them, I need to click the item, which takes me to the Project view that contains that one item... This is slightly confusing to me, because when I am "processing" I want to stick to processing. I don't want to go back-and-forth between processing and planning.