I'm so happy this is just something I missed. Backwards functioning Get Item From List FTW! What a nice surprise! I think I really like how this solution works in that by design you can limit and order the data that you want to address/select.
I'm wondering if there is a way to address (from a node other than Share Value) specialized ports on nodes such as the Feedback Blend Mode port on the Blend Image with Feedback node or the Smoothing port on the Filter and Smooth Controller Midi node? I would like to be able to control/map these variables with keyboard, midi, or otherwise.