To learn I-No is to know how to utilize almost every mechanic in the game as a necessity. In addition you have to have a clear understanding on how inputs work and have a grasp of how to put play on them. IE you may need to do 4K(HOLD)789632S147896K(RELEASE) in a single motion, not to mention the timing differs from your standard 5K HCL motion. Even on her standard combos, timing has to be very precise. 66JK, 2K, cS8, 2H, 2D, HCL sounds easy on paper but if you don't know how she works you'll struggle just trying to link JK to 2K.