Essentially a togglable hit error bar for 100's and 50's that pop up after you don't acc a note. The hit error bar is pretty hard to read in my opinion and doesn't offer feed back that you can see while playing the map. With something like this players may be able to adjust the speed of their taps If the 100's could change colour depending on how fast or slow they hit the note. It would also benefit new players that can't understand why they aren't hitting that one note consistently and don't know what the hit error bar is.