It would be great to have support for Connectors / Connection Shapes / Start and End Connections (cxnSp, stCxn, endCxn in the OOXML spec) in the Office JS API for PowerPoint. Currently you can draw lines, but there is no way to connect those lines to shapes, so the drawing lines seems to be less useful, as once you move a shape the line does not remain connected.
Thank you!