Apart from the MASSIVE amount of time that dropdowns now take compared to quick switching with tabs previous Version not much . but I am mostly appalled that you choose to do a Dropdown list instead of a Sidebar format like adding runes into a rune page is like where you can still see all most of them and be able to quickswitch compared to increased inputs for the same amount of information . For your arguments on it doesn ' t scale well and identifying information this is only the case when they are not in a Vertical listed format where I think you thought dropdowns were a good idea . I don ' t want to say it but I think your team thought of only this and it was more of a get it over with change . People have already complained about the space in between the various masteries being too much . While the dropdown when not used but just there does look visually appealing due to the balance on both sides of the page the overall quick changing that was useful in the legacy client is why people used it over the dropdown from the main champion select screen . As I had said before it looks entirely to be a form over function change . A tradeoff is only good if there is a net gain in functionality for the user , What gains did the user get function wise ?