I know your opponents were good, but IMO, they most not have been used to QAC. As fast as QAC is, all that the MK has to do to interrupt you QAC when through them is to throw out an attack (especially tornado.) Like I said, it has a lot of nice setups, but it is very punishable. Sure, you can get away with it from time to time, but when your opponent catches on, you should really minimize. you use of aggressive QAC.
I don't know how to do it? Lol. I know how do to it and when do it just fine. My use of QAC is accurate and adequate. Please, don't make assumptions about things that you know nothing about. Of course QAC can be used for better positioning and such. Maybe I forgot to add that offensive QACing is what I am talking about. My bad. But, in either case, it is something that must be used sparingly and smartly.