Oh, man. There are so many things lacking. I'd love to see a smooth, modular front-end system that provided a ridiculous amount of utility and flexibility. Being able to tap user's names to auto-add their tag in a comment is a small thing I'd love to see on Partiko. Also, to have a visualization of votes trickling in, with their strength (like on Steemnow) but integrated in the browser itself, maybe you could swipe left and right to put different filters over the blockchain to access different data. Overall, this is still such a new space! Exciting and frustrating at the same time.