Myself and a few others want a "sliderstyle: 0" that reverts sliders back to a solid color (without the gradient present in style 2).
I know nothing about the version control system used for osu!, and I don't know a whole lot about opengl and directX (or XNA for that matter), but I can't imagine it would be all that difficult to render sliders the same way they were rendered way back when. I guess more elements would have to be added to whatever engine parses the skin.ini too, but I would be willing to make those changes for you myself if you gave me the source! XD
I know nothing about the version control system used for osu!, and I don't know a whole lot about opengl and directX (or XNA for that matter), but I can't imagine it would be all that difficult to render sliders the same way they were rendered way back when. I guess more elements would have to be added to whatever engine parses the skin.ini too, but I would be willing to make those changes for you myself if you gave me the source! XD