A week or so ago I tested how much time loss we would get from the new menu popup. Funny enough, if you are really good at doing the menus fast, you could save like 1.3-1.4 seconds per menu because you don't have to wait for the stars to show up at the end of the levels. So there is no time loss only time saves. The old/new patch categories will still be separated but I can't wait to see how low these times can get. Especially runs from syuya0523, they are pretty goated.
Have a nice day, Skullz