She is much easier to play on stick, assuming you have the practice with a stick (I had/stillsometimesatrandomhave troubles with DP on stick while I could do it fine on pad, which everyone has told me is weird) but for the most part it's going to be significantly easier and faster to learn her on stick, there is absolutely no reason you can't do her stuff on pad, you may have to tinker with things to do it right, but it's doable.
For BBCT (on xbox) I went x=a y=b b=c a=d rb=a+b rt=b+c lb = a+b+c lt= a+b+c+d) and it worked out. But when I started picking up friend's sticks and playing, once I got used to inputting the combos on sticks I saw how much easier and more consistent sticks are with her combos. Just be patient and sometimes (especially with the 360 controllers) it's not always YOUR fault the combos don't work, you might have to adjust the motions a bit to work with pad and not get different inputs.