Transform a transform sop UI Handle by Matrix

[Djangotron]

Hello, 

I'm trying to stick a transform sop's UI handle to a point or prim without loosing control of the pivot functionality of the transform node. 

1. I've bundled this into an HDA and promoted the handle and used a point expression to get a position from the point
2. I've got the rotation via another point expression and some VEX to unpack the matrix
3. I use both of these expressions on the transform handles pivot translate and pivot rotate parameters

This gives me the expected behavior with exception to the pivot being overwritten.

Is there a way that I could 'parent' this handle or use the pre-translate/rotate for this problem?

The only option I see for this right now is a custom python handle but I'm just wondering if there is anyone more creative than I who could suggest an alternative way around this problem.