Love the idea! Here is what I got from the top of my head:
*DIY Pedals - especially the Zvex Super Hard on, which is super easy and effective
*You mentioned split wiring, but I need to, as always, add that PRS style splits are great and make that wiring more usable
*General setup - be it getting rid of fret buzz or raising the action to allow the guitar to breathe more, can make a difference
*Mixing up the pedal chain