Going through the Spine videos ... no way to separately key X and Y. Anime Studio didn't have that either. But coming from Maya where you have so much control it's a bit frustrating.
Mind mindbogglingly, the "Graph" view just shows the shape of the curve to the next keyframe and not an actual Distance/Time value. So simple motions like a jump, bounce, pelvic sway, etc. can't be seen/edited graphically, it can only be "eyeballed" as you press play?