but sounds like an interesting package.
ParallelProcessingTools is a bit of a mix of pre-Julia-v1.3 workarounds and long-term usable functionality. It’s been around for a while, I’ll need to refresh some parts of it sometime. 
Is this going to add something you discussed in Propagation of available/assigned worker-IDs in hierarchical computations
I was thinking about adding something like that, yes - however, I’m still not sure about how to propagate worker-availability to child tasks in a consistent fashion.