Hey @670593 ,
Welcome to the community! Feel free to Introduce yourself 
to the community if you want to! 
Custom shared parameters are stored by their GUID in Revit API. If you examine it in Speckle’s viewer, you would see that. You can get it’s value by searching via its GUID.
BTW, You can write a really short Python script to skip all Deconstruct Speckle Object nodes. Take a look👇:
