Yeah, the 'snapping' is what I mean. Not transitions between animations, but between keyframes of a single animation. For example, having the arm of my character snap instantly from one location to another, rather than smoothly animating between. This works if I manually edit the animation curve to be constant. Spriter also does it with the 'Instant' transition type.
However, it doesn't look like the importer preserves the transition type, and will always result in smooth transitions.