Our team loves it the Sync + Prototype inside Sketch, but sometimes I would like test some interactions before uploading the screens to InVision. I remember that option (via cable) exist before you release the stable version, we miss it! "Maybe preview in a floating window inside Sketch, now it's possible". :)
Another recommendation we have, it's the possibility to remove the all hotspots directly in Sketch file, right it's annoying when you want to remove some hotspots.