I've submitted a forum post asking about how to set List Variables via Launch UI (linked below), and the response was that this needs to be done via Custom Code.
Setting of Adobe Analytics List Variables in Launch?
I'm requesting that this functionality be built into Launch to maximize the options available to non-developers like myself.
I really hope this will be supported soon.
For example in the "Set Variables" Action, it is very error prone having your evar, props and events mapping done in the UI, and then below inside the custom code, where you set the list variable, you have to know / remember to maintain the linkTrackVars and linkTrackEvents or they will not be included in the reporting.
It should be a fairly simple task to support list variables from the ui since the implementation could just be the same as for evars.