Honestly, you need to use the X or Y button if you plan on playing at anything close to a competetive level. There are just too many downsides to using the analog stick. It's too much quick motion for your thumb, and you can't DI while jumping, or smashing, or doing aerials, or anything. Years ago, I used the analog stick to jump as well, but I made the change because, well it's absolutely necessary. I apologize for giving you another X/Y answer, but I really can't stress this enough. You need to use the jump buttons, at least for waveshining and SHFFLC-ing.