I'd like a toolkit of nodes for creating and manipulating structures.
An obvious use would be single cord patching between macros, essentially allowing you to create custom nodes out of macros.
More exotic uses would be editing the data in structures in-place, merging them etc.
I'll leave an exact feature list to those with more experience of other patching environments, or till i'm deep in the middle of a qc project and cursing heavily =]
More like this