Asymmetric Bezier Curve
It appears that, in XD, the only way to create a Bezier curve with handles that have asymmetric magnitude is to press option/alt, which also means that the linearity between the lines is broken. Those of you familiar with Sketch will note that this functionality is built right into the inspector area (see attached). This feature would obviously give a lot more flexibility to the types of curves we could create without creating unwanted breaks in the smoothness of said curves.
Interestingly, this is the exact opposite of how bezier curves work in Illustrator. In Illustrator, the handles only remain symmetrical when you first create the curve point. When you go back to edit the handles, the magnitudes of the handles are unlinked and adjust independently.
P.S. My phrasing may be a little awkward, or my nomenclature may be wrong. Someone please correct me or lmk if I'm not being clear.