@Dr-Sassi, thanks so much for your response! That's fair. I have a working xpresso rig that is production ready, but just wanted to explore another setup with nodes. I'll stick with that for now.
Also thank you for the insight regarding the "yellow flask". In effort to avoid those I rebuilt my rig using a standard scene node setup (no flasks). I tried outputting both Object Name and a string from user data and both output nullData. So it seems whatever the issue is, it isn't specific to the new Nodes Spline.
Still hoping to find out if this is user error or an issue with the nodes themselves, but I did find a solve.
My solution was to use xpresso tag to drive a scene node input with the object name and kick that string directly to the text node. Solved the problem by going around it.